Sagot :
pour le developpement:
G= (2x-1)(2x-1)+(2x-1)(5x+5)
=4x²-4x+1+10x²+10x-5x+5
=10x²+4x²-1x+6
G= (2x-1)(2x-1)+(2x-1)(5x+5)
=4x²-4x+1+10x²+10x-5x+5
=10x²+4x²-1x+6