Odpowiedzi

2009-05-25T22:47:11+02:00
(2-3x)²-(1+2x)²-3x²=2x²
4-12x=9x²-1-4x-4x²-3x²=2x²
2x²-16x+3=2x²
2x²-2x²-16x=-3
-16x=-3\-16
x=3\16

2x(x-1)=2x²+4
2x²-2x=2x²+4
2x²-2x²-2x=4\-2
x=-2

(y-20(3+2y0-y²=y²+5
3y+2y²-6-4y-y²=y²+5
-y+y²-6=y²+5
-uy-y²+y²=6=5
-y=11
y=-11