Fullstendig kvadrat
Fullstendig kvadrat
Fullstendig kvadrat
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Løse opp parenteser<br />
3(x 2 + 3x -2) = 3x 2 + 9x - 6<br />
(2x – 3)(x + 2) = 2x 2 + 4x – 3x - 6 = 2x 2 + x - 6<br />
Husk å skifte fortegn når det står minus foran parentesen<br />
2y 2 – (y + 3)(2y – 1) = 2y 2 –(2y 2 –y + 6y -3)<br />
= 2y 2 – 2y 2 – y + 6y + 3 = 6y + 3