bonjour, multiplier ( développer , puis réduire, les expresions suivantes !! c = (3c+1)(-5c+2)-(c+3) d = (2-3d)(-1+2d)-(2d+1)(3-4d) e = (2x-3)aucarré+2(1-2xauca

Bonsoir,

C = (3c+1)(-5c+2)-(c+3) = -15c²+6c-5c+2-(c+3) = -15c²+6c-5c+2-c-3 = -15c²-1

D = (2-3d)(-1+2d)-(2d+1)(3-4d) = -2+4d+3d+6d²-(6d-8d²+3-4d) = -2+4d+3d+6d²-6d+8d²-3+4d = 14d²+5d-5

E = (2x-3)²+2(1-2x²) = (2x-3)²+2-4x² = 4x²-12x+9+2-4x² = -12x²+11