!!!!1!!!!!2!!!!3!!!!4

Question

!!!!1!!!!!2!!!!3!!!!4

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Answer 1

A) a+b+c(a+b)=(a+b)+c(a+b)=(a+b)(1+c)
б) (x+y)²+(x+y)=(x+y)(x+y+1)
в) x+2a(x-y)-y=(x-y)+2a(x-y)=(x-y)(1+2a)
г) x²-y²+x+y=(x-y)(x+y)+(x+y)=(x+y)(x-y+1)