Răspunsuri

2014-11-15T23:47:30+02:00
X²+6x+9-y²=x(x+6)+(3-y)(3+y)
x²-5x+6=(x-3)x-2)
2x²+x-1=(x-1/2)(x+1)
x³+x²-16x-16=(x+1)(x²-16)=(x+1)(x-4)(x+4)
x²+2x-3=(x-1)(x+3)
(x-2)²-4x²=x²-4x+4-4x²=-3x²-4x+4=(x+2)(x-2/3)