LOL51
Answered

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A=(2x-4)(5-x)+(2x-4)² 1)Développer et réduire l expression A
                                    2) Factoriser l expression A 

Sagot :

TOMMUS
Question n°1 :

A = (2x - 4)(5 - x) + (2x - 4)²
A = 10x - 2x² - 20 + 4x + 4x² - 16x + 16
A = 2x² * 2x - 4.

Question n°2 :

A = (2x - 4)(5 - x) + (2x - 4)²
A = (2x - 4) [(5 - x) + (2x - 4)]
A = (2x - 4) (5 - x + 2x - 4)
A = (2x - 4) (x + 1)