Matemática 2 - Colégio Soter

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Colégio SOTER - Caderno de Atividades - 8º Ano - Matemática - 2º Bimestre e) (x + 1) 2 – (x – 2) 2 = _________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ f) ½[(x + 1) 2 + (x – 1) 2 ] = ______________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ g) (m – 1) 2 – (m + 1)(m – 1) = ___________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ h) (x + 4)(x – 4) – (x – 4) 2 = _____________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ 22) (2a – 5b)² é o mesmo que: a) 4a² – 20a²b² + 25b² b) 4a² + 20ab – 25b² c) 4a² + 20ab + 25b² d) 4a² – 20ab – 25b² e) 4a² – 20ab + 25b² Resolução: __________________________________________________________________________________ 23) A expressão (2n+1)² + (n+2)² + 2(n+1)·(n-1) é igual a: a) 7n² + 6n + 3 b) 7n² + 6n – 3 c) 7n² + 6n + 4 d) 7n² + 8n + 4 e) 7n² + 8n + 3 Resolução: __________________________________________________________________________________ ___________________________________________________________________________________________ 24) Fatore as expressões: 4. Fatoração a) 7q 2 – 28 = _______________________________ b) 33x + 22y – 55z = ______________________________ c) x 6 + x 7 + x 8 = ____________________________ d) 36 cd + 6 cd 2 = _________________________________ e) x(a + b) + y(a + b) = ______________________ f) 2a(x – 1) – b(x – 1) = ____________________________ g) 7a – 7c + ma – mc = _______________________ h) a 3 + 3a 2 + 2a + 6 = ______________________________ i) x 3 – x 2 + 5x – 5 = __________________________ j) x 2 – 36 = _______________________________________ l) 25 – a 2 = _________________________________ m) 9x 2 – 16 = _____________________________________ n) 9x 2 – 16 = _______________________________ o) 1 – 81a 2 = _____________________________________ p) 100 – π 2 = ______________________________ q) 36x 4 – y 6 = _____________________________________ r) x 2 + 2x + 1 = ______________________________ s) x 2 – 2x + 1 = ___________________________________ t) 1 – 6m + 9m 2 = ___________________________ u) x 2 + 12x + 36 = _________________________________ v) 36a 2 – 12ac + c 2 = _________________________ x) y 4 + 4y 2 + 4 = __________________________________ 25) Agrupe os termos e fatore: a) 5x + ax + 5y + ay = _________________________________________________________________________ b) x 3 + 2x 2 + 7x + 14 = ________________________________________________________________________ c) c 2 – c + cx – x = ____________________________________________________________________________ d) ax + bx + ay + by + az + bz = ________________________________________________________________ 12
Colégio SOTER - Caderno de Atividades - 8º Ano - Matemática - 2º Bimestre 26) Relacione as expressões equivalentes: A) x(x + 5) ( ) 20x + 4 B) 5x + 10 ( ) 5(3x + 4) C) x + 5x 2 ( ) x 2 + 5x D) 4(1 + 5x) ( ) 5(2 + x) E) 15x + 20 ( ) x(1 + 5x) Anotações... BOM ESTUDO! Profª Renata Lorenzo ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ 13
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Matemática 2 - Colégio Soter

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