Sagot :

yatiranya

Explications étape par étape:

c(x)=(2x+2)²-(3x-1)²

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

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

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

d(x)=x²+6x+9+2(x+3)²

=x²+2×3×x+3²+2(x+3)²

=(x+3)²+2(x+3)²

=(x+3)²(1+2)

d(x)=3(x+3)²