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а) a(x-2)-b(x-2)+c(x-2) = a(x-2)-b(x-2)-c(x-2)= (x-2)*(a-b-c)
б) 2a(x-y)+2b(y-x)-c(x-y)= 2a(x-y)-2b(x-y)-c(x-y) = (x-y)*(2a-2b-c)
упрощение
1)<span>(p-4)x+2p-4(x+p)=0</span>
px-4x+2p-4x-4p=0
-8x-2p+px=0
(p-8)x-2p
2)<span>px+2(p+1)x+p+2=0</span>
px+2px+2x+p+2=0
3px+2x+p+2=0
(3p+2)x+p+2
3)<span>3x-5(2x-1)=2x-1</span>
<span>3x-10x+5-2x+1=0</span>
<span>-9x+6=0</span>
<span>x=-(6/9)=-(2/3)</span>
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