Sagot :

lxdfo

Réponse:

A = 3+(4+x)

=3+4+x

=7+x

B=8+(-5+x)20

=8+20(-5+x)

=4(2+5(-5+x))

=4(2-25+5x)

=4(-23+5x)

C=7x+(-3x-20)

=7x-3x-20

=4x-20

=4(x-5)

D=-5x+(7+5x)

=-5x+7+5x

=7

E=4+(-11x-4)2x

=4+2x × (-11x-4)

=2(2+x × (-11x-4))

=2(2-11x²-4x)

bonne chance !