2 i 3 ISPIT ZNANJA
Rješenja testa br. 2. i 3. - MIM-Sraga
Rješenja testa br. 2. i 3. - MIM-Sraga
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ALGEBARSKI IZRAZI – test br.2. i 3.<br />
www.mim-sraga.com<br />
12.<br />
( ) ( )<br />
( ) 1( )<br />
a) ac−bc− a+ b = c a−b −1<br />
a− b =<br />
= ca−b − a− b =<br />
( a b)( c 1)<br />
= − −<br />
podcrtamo zajednički faktor, izlučimo Z.F.<br />
13.<br />
3 2 2 2 2 2 2 2<br />
a) x − 2x + 3xy − 6y = x⋅x −2⋅ x + 3⋅x⋅y −2⋅ 3y<br />
=<br />
( 2) 3 ( 2)<br />
( 2) 3 ( 2)<br />
= ⋅ − + ⋅ − =<br />
2 2<br />
x x y x<br />
= ⋅ − + ⋅ − =<br />
2 2<br />
x x y x<br />
2 2<br />
( x 2) ( x 3y<br />
)<br />
= − ⋅ +<br />
podcrtamo zajednički faktor<br />
izlučimo Z.F.<br />
14.<br />
2 3 2 2 3 2 1 2 2 2 1<br />
a)<br />
x y −xy z− z xy− z = x⋅x⋅y ⋅y − x⋅y ⋅z− z ⋅x⋅y− z ⋅ z =<br />
( ) ( )<br />
xy xy z z xy z<br />
2 1 2 1<br />
= − − ⋅ − =<br />
( ) ( )<br />
2 2<br />
xy xy z z xy z<br />
= − − ⋅ − =<br />
2 2<br />
( xy z)( xy z )<br />
= − −<br />
15.<br />
( ) ( ) ( ) ( )<br />
4 2 4 2<br />
a) x 3 y y 3 y x 3 y y 3 y<br />
− − − = − − − =<br />
4 2<br />
( 3 y)( x y )<br />
( 3 )(( ) )<br />
2 2<br />
( 3 y)( x y)( x y)<br />
= − − =<br />
= − y x − y = prepoznaj: a −b<br />
= − − +<br />
2 2 2 2 2<br />
16.<br />
3 2 2 3 2 2 2 2<br />
a)<br />
a a<br />
−<br />
b− ab + b = a ⋅a−a ⋅b−a⋅ b + b ⋅ b =<br />
( ) ( )<br />
= − − − =<br />
2 2<br />
a a b b a b<br />
2 2<br />
( a b)( a b )<br />
= − − =<br />
( a b)( a b)( a b)<br />
= − − + =<br />
2<br />
( a b) ( a b)<br />
= − ⋅ +<br />
Drugi i treći ispit znanja iz matematike za prvi razred gimnazije , tehničkih škola i svih ostalih škola …<br />
Autori: Ivana i Mladen Sraga<br />
centar za poduku i online poduku M.I.M.-Sraga