408 сроооочно нужно 2 и 4

Question

408 сроооочно нужно 2 и 4

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Answer 1

2. 4 (x-y) + 3 (x-y)^2= (x-y)(4+3(x-y))= (x-y)(4+3x-3y)
4. (a-b)^2 - (b-a)= (a-b)^2- (-(a-b))= (a-b)^2+(a-b)= (a-b)(a-b+1)