Développe et réduit A = 5(-3+6x)+(4x-7) B=(2-5x)-(3-2x)+(2x-6) C=(6y+2)x3-(2y+7)x4

A = -15+30x+4x-7 = 34x-22
B = 2-5x-3+2x+2x-6 = -1x-1 (je ne suis pas sure, sure)
C= 18y+6-(8y+28) = 18y+6-8y-28 = 10y-22

Bonjour

A = 5(-3+6x)+(4x-7)
A = -15 +30x +4x -7
A = 34x -22

B=(2-5x)-(3-2x)+(2x-6)
B = 2 - 5x - 3 +2x +2x -6
B = -x -7

C=(6y+2)x3-(2y+7)x4
C = 18y +6 - (8y +28)
C = 18y +6 -8y -28
C = 10y - 22