Réponses

2013-03-04T20:18:56+01:00

x²+2²

x-2*x*2+2² = x-4x+4

x+2*x*3+3²=x+6x+9

(2x)²+1² = 4x² +1

x²+8x... = (x+4)²

(x-3)²

4x²-(3/5)² (je pense)

(3x)²-8² = 9x²-64