Vous pouvez m’aider pour l’exercice 15 svp.... Pergunta de ideia demarinemjrvw

marinemjrvw @marinemjrvw

December 2020 1 75 Report

Vous pouvez m’aider pour l’exercice 15 svp

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iamthequeen

Bonjour,

a) A = $(x-1)(2x+5)$ on effectue la double distributivité

A = $2x^{2} +5x-2x-5$

A = $2x^{2} +3x-5$

b) B = $(4-2x)(5x-9)$

B = $20x-36-10x^{2} +18x$

B = $-10x^{2} +38x+36$

On peut simplifier l'expression en divisant par deux :

B = $-5x^{2} +19x+18$

c) C = $(-x+1)(x-1)$

C = $-x^{2} +x+x-1$

C = $-x^{2} +2x-1$

d) D = $(-3-2x)(-6-3x)$

D = $18+9x+12x+6x^{2}$

D = $6x^{2} +21x+18$

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