Bsr
Développer, réduire et ordonner :
A = (x+3)(x+5)-4
A = x²+5x+3x+15-4
A = x²+8x+15-4
A = x²+8x+11
B = x(3-2x)+5x²+2x
B = 3x-2x²+5x²+2x
B = 5x-2x²+5x²
B = 5x+3x²
C = (5-t)(1+2t)+2(3t+4)
C = 5+10t-t-2t²+6t+8
C = -2t²+15t+13
D = 2x²(x+6)-x³+4x²-2x
D = 2x³+12x²-x³+4x²-2x
D = x³+16x²-2x
Bonne fin d'année !