Verified answer

Bonjour

Compléter :

(x - 2)(x + 2) + (x - 2)(x + 7)

= (x - 2)(x + 2 + x + 7)

= (x - 2)(2x + 9)

(2x + 1)(1 - x) + (2x + 1)(3 - 2x)

= (2x + 1)(1 - x + 3 - 2x)

= (2x + 1)(-3x + 4)

x(x + 2) + (x - 4)x

= x(x + 2 + x - 4)

= x(2x - 2)

(z + ?)(2z + 2) - (z + ?)(z + 8) = (z + 3)(z - 6)

= (z + 3)(2z + 2 - z - 8)

= (z + 3)(z - 6)

(x - 3)(x - 1) + (x - ?)(x + 5) = (x - 3)(2x + ?)

= (x - 3)(x - 1 + x + 5)

= (x - 3)(2x + 4)