Sagot :
-7(3x-1)-(6x-2)(x-4)+(2x-1)²
=-21x+7-(6x²-24x-2x+8)+(4x²-4x+1)
=-21x+7-6x²+24x+2x-8+4x²-4x+1
=-2x²+x
CORRECT !
=-21x+7-(6x²-24x-2x+8)+(4x²-4x+1)
=-21x+7-6x²+24x+2x-8+4x²-4x+1
=-2x²+x
CORRECT !
-7(3x-1)-(6x-2)(x-4)+(2x-1)²
=-21x+7-(6x²-24x-2x+8)+4x²-4x+1
=-21x+7-6x²+24x+2x-8+4x²-4x+1
=-2x²+x
donc, tu as juste :)
=-21x+7-(6x²-24x-2x+8)+4x²-4x+1
=-21x+7-6x²+24x+2x-8+4x²-4x+1
=-2x²+x
donc, tu as juste :)