Réponses

2014-03-16T13:53:28+01:00
A(x)=4x²+4x+1-(6x-2-3x²+x)
=4x²+4x+1-6x+2+3x²-x
=7x²-3x+3

B(x)=16x²-1-2x-8
=16x²-2x-9

C(x)=25x²-20x+4-(6x²-4x+9x-6)
=25x²-20x+4-6x²+4x-9x+6
=19x²-25x+10