Réponses

2013-12-11T14:15:30+01:00
A = 5(t+3)+2(3t+4)-(5t-3)
A = 5t+15+6t+8-5t+3
A = 6t+26

B = 3y(2+5y)-4(1-2y)+(3y²-5y+3)
B = 6y+15y²-4+8y+3y²-5y+3
B = 18y²+9y-1

C = (4x-1)(3x+5)-(x-7)
C = 12x²+20x-3x-5-x+7
C = 12x²+16x+2

D = (x+5)(2x-5)-(3x²-7x+5)
D = 2x²-5x+10x-25-3x²+7x-5
D = -x²+12x-30