Réponses

2013-12-03T18:57:05+01:00
((2x²+3)²-(5x+9)²)²
=
((2x²+3)²-(5x+9)²)((2x²+3)²-(5x+9)²)
=[(2x²+3-5x-9)(2x²+3+5x+9)]
[(2x²+3-5x-9)(2x²+3+5x+9)]
=(2x²-5x-6)(2x²+5x+12)(2x²-5x-6)(2x²+5x+12)
=(2x²-5x-6)²(2x²+5x+12)²