JOHANNLESPARRE1
Answered

Exercice 1 : HELP ME svp je comprend pas !!!!

1) Développer
A= (3x - 7)2 - 4(x + 8)

2) Factoriser:
B = (3x - 7)2 - (3x - 7)(2x + 5)

3) Factoriser:
C = (2x + 3)2 - 49

Sagot :

VINS

bonjour

A = 9 x² - 42 x + 49 - 4 x - 32 = 9 x² - 46 x + 17

B = ( 3 x - 7 ) ( 3 x - 7 - 2 x - 5 ) = ( 3 x - 7 ) ( x- 12 )

C = ( 2 x + 3 - 7 ) ( 2 x + 3 + 7 ) = ( 2 x - 4 ) ( 2 x  + 10 )