Bonjour aidez moi s'il vous plait A=([tex]( -3x -1) (-9 x-4) - (10 x+10) ^{2} [/tex] B=[tex](5 x-6) (5 x+6) + (10 x-1) ^{2} [/tex]

Hello !

A = (-3x-1)(-9x-4)-(10x+10)²
   = 27x²+12x+9x+4-(100x²+200x+100)
   = 27x²-100x²+12x+9x-200x+4-100
   = -73x²-179x-96

B = (5x-6)(5x+6)+(10x-1)²
   = (5x)²-6²+(100x²-20x+1)
   = 25x²+100x²-20x-36+1
   = 125x²-20x-35

Bonjour,

Développer et réduire ces expressions:

A= (-3x-1)(-9x-4)-(10x+10)(10x+10)
A= 27x²+9x+12x+4 - (100x²+100x+100x+100)
A= 27x²+21x+4 - 100x²-200x-100
A= -73x² -179x - 96.

B= (5x-6)(5x+6) + (10x-1)(10x-1)
B= 25x²-30x+30x-36+100x²-10x-10x+1
B= 125x²-20x-35