Odpowiedzi

2009-11-05T17:03:02+01:00
(7x)²-4x-(6x)²+4x-(x)²+5x=49x-4x-36x+4x-x+5x=45x-36x+4x-x+5x=9x+4x-x+5x=8x+4x=12x
2009-11-05T17:03:37+01:00
A)7x²-4x-6x²+4-x²+5x=x+4
b)-6a+4b-8a+12a²-8ab=-14a+4b+12a²-8ab
c)8x+20-2x²-5-4=8x-2x²+11
d)12x-12-6x²+6-6x²-2=12x-12x²-8
2 2 2