Website Statistics A4x1x44x15xB2x3x114x 1sur2x1

Répondre :

A=(4x+1)(x-4)-4x(1-5x)
  =4x²-16x+x-4+20x²-4x
  =24x²-19x-4

B=2x(3x-1)-(1-4x) (1/2x+1)
  =6x²-2x-(-2x²+1+1/2x-4x)
  =8x²+3/2x-1

D'autres questions