представте в виде произведения:
ax-5x-a^2+5a
ab-ac+2c-2b-b+c
(a-5)*x-a^2+5*a
(a-5)*(x-a)
___________
(3-a)*c+(a-3)*b
-(a-3)*(c-b)
ax-5x-a^2+5a=(ax-5x)+(-a^2+5a)=x(a-5)-a(a-5)=(x-a)(a-5)
ab-ac+2c-2b-b+c=ab-ac+3c-3b=(ab-3b)+(-ac+3c)=b(a-3)-c(a-3)=(b-c)(a-3)
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ax-5x-a^2+5a
(a-5)*x-a^2+5*a
(a-5)*(x-a)
___________
ab-ac+2c-2b-b+c
(3-a)*c+(a-3)*b
-(a-3)*(c-b)
ax-5x-a^2+5a=(ax-5x)+(-a^2+5a)=x(a-5)-a(a-5)=(x-a)(a-5)
ab-ac+2c-2b-b+c=ab-ac+3c-3b=(ab-3b)+(-ac+3c)=b(a-3)-c(a-3)=(b-c)(a-3)