Répondre :
1- f(x)=(8x-2)(2x-3)-(4x-3)^2
= (16X^2 - 24X - 4X + 6) - (16X^2 - 24X + 9)
= 16X^2 - 24 X - 4X + 6 - 16X^2 + 24X -9
= -4X - 3
= (16X^2 - 24X - 4X + 6) - (16X^2 - 24X + 9)
= 16X^2 - 24 X - 4X + 6 - 16X^2 + 24X -9
= -4X - 3