Sagot :

vaxlou

Bonjour

A = (2x+2)(x-1)+(2x-3)(x+3)

=2x^2 -2x + 2x -2 + 2x^2+6x-3x-9

=4x^2+3x-11

B=(-x+1)(3x-1)-(2x+1)(2x-1)

=-3x^2+x+3x-1-(4x^2-1^2)

=-3x^2+4x-1-4x^2+1

=-7x^2
Bonsoir

Voilà pour toi

(2x + 2) x (x-1) + (2x-3) x (x+ 3)

2x^2 - 2x + 2x - 2 + (2x-3) x (x+ 3)

2x^2 - 2x + 2x - 2 + 2x^2 + 6x - 3x - 9

2x^2 - 2 + 2x ^2 + 6x - 3x - 9

4x^2 - 2 + 6x - 3x - 9

4x ^2 - 11 + 6x - 3x

4x ^2 - 11 + 3x

A = 4x^2 + 3x - 11

( -x-1 ) x ( 3x - 1 ) - ( 2x + 1 ) x ( 2x - 1 )

-3x ^ 2 + x -3x+1 - (2x+1) x (2x-1)

-3x ^ 2 +x - 3x + 1 - (4x ^ 2 - 1 )

-3x ^ 2 +x - 3x + 1 - 4x ^ 2 + 1

- 7x ^ 2 + x - 3x + 1 + 1

- 7x ^ 2 - 2x + 1 + 1

B = - 7x ^ 2 - 2x + 2

Voilà j’espère que j’ai pu t’aider