Odpowiedzi

2010-03-18T12:29:04+01:00
3(x+2)-7(2-3x)=8(x-3)
3x+6-14+21x=8x-24
24x-8x=-24+14-6
16x=-16/:16
x=-1

(x-9)*=(x+2)(x-2)(1.5x-4)
x²-9x-9x+81=(x²-2x+2x-4)*(1,5x-4)
x²-18x+81=1,5x³-4x²-6x+16
-1,5x³+x²+4x²-18x+6x=16-81
-1,5x³+5x²-12x=-65