TU 35 l Développer les expressions. A=-3(5+5) B = -7/t - 3) C = 4(-5u - 1 D = 9(-2 - 7v) E = 4w(10 - w) F = - x(4x - 9) svp maths 4*​

A=-3(5+5)  = -3x5 -3x5 = -15 - 15 = -30

ou A = -3 x 10 = -30

B = -7(t - 3)  = -7xt - 7x(-3) = -7t + 21

C = 4(-5u - 1) = 4x(-5u) + 4x(-1) = -20u - 4

D = 9(-2 - 7v)  = 9x(-2) + 9x(-7v) = -18 - 63v

E = 4w(10 - w)  = 4wx10 +4wx(-w) = 40w - 4w²

F = - x(4x - 9) = -x*4x - x*(-9) = -4x² + 9x

Réponse:

A=-15-15=-30

B=-7t+21

C=-20u-4

D=-18-63v

E=40W-4w^2

F=-5x+9x