bonsoir
a = x² - x + 3 x - 3 = x² + 2 x - 3
b = - 6 x² - 2 x + 3 x - 1 = - 6 x² + x - 1
c = - 4 x² + 20 x + x - 5 = - 4 x² + 21 x - 5
d = 3 ( 2 x² + 4 x - 4 x - 8 ) = 6 x² + 12 x - 12 x - 24 = 6 x² - 24
e = x² - 4 x + 4
f = 16 x² + 8 x + 1
Bonsoir,
Developper et réduire les expressions suivantes:
a. (x+3)(x-1) = x²+3x-x-3
= x²+2x-3
b.(2x - 1)(-3x +1)= -6x²+3x+2x-1
= -6x²+5x-1
c. (-4x + 1)(x - 5)
= -4x²+x+20x-5
= -4x²+21x-5
d. 3(x-2)(2x+4)= 3(2x²-4x+4x-8)
= 6x²-24
e.(x-2)² = x²-4x+4
f. (4x + 1)²= 16x²+8x+1
