вынесите общий множетель за скобки
a(b-c)+ 10 (b-c)
7(a+x)- b(a+x)
c (x-y)- (x-y)
a(x-y)-(x-y)
(a-b)^2+3 (a-b)
(x-1)^2+7 (x-1)
(b+5)^2-b (b+5)
-2a (a+4)+ (a+4)^2
a(b-c)+ 10 (b-c)
7(a+x)- b(a+x)
c (x-y)- (x-y)
a(x-y)-(x-y)
(a-b)^2+3 (a-b)
(x-1)^2+7 (x-1)
(b+5)^2-b (b+5)
-2a (a+4)+ (a+4)^2
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Answers & Comments
7(a+x)- b(a+x)=(a+x)*(7-b)
c (x-y)- (x-y)=(x-y)*(c-1)
a(x-y)-(x-y)=(x-y)*(a-1)
(a-b)^2+3 (a-b)=(a-b)*(a-b+3)
(x-1)^2+7 (x-1)=(x-1)*(x+6)
(b+5)^2-b (b+5)=(b+5)*5
-2a (a+4)+ (a+4)^2=(a+4)*(4-a)