asked 222k views
5 votes
42 Développer chaque produit, puis réduire les expres-

sions obtenues.
A= 5x-3(x+12)
C = 2x² + x(4x - 5)
B=3x-6+7(2x+4)
D=4x²-x+x(5x-9)

asked
User Rekcs
by
8.4k points

1 Answer

4 votes
bonsoir
5x-3(x+12)=
5x-3x-36=
2x-36

3x-6+7(2x+4)=
3x-6+14x+28=
17x+22

2x²+x(4x-5)=
2x²+4x²-5x=
6x²-5x

4x²-x+x(5x-9)=
4x²-x+5x²-9x=
9x²-10x
answered
User Ikel
by
8.1k points
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