3(x+2)-7(2-3x)=8(x-3) (x-9)*=(x+2)(x-2)(1.5x-4) *-do kwadratu

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