J’ai besoin que vous me calculez sa svp (niv 4 eme)

1) supprimer les parenthèses et réduire

A) -9(2x+3)
B) 7-(-5x+4)
C) (12-5x) x (-4) + (10-3x)
D) (8-3x)(3x-2)
E) (2x+1)(x-7)

2) factoriser:

F) 16x ² + 20x
G) 42+35x
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