a) (a-b)(a+b)-4(a+b)=(a+b)(a-b-4)
б) 2(x+y)-(x+y)^2=(x+y)(2-x-y)
1 . (a-b)×(a-b-4)
abo
(a-b)×(a+b)-4b-4a
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Answers & Comments
a) (a-b)(a+b)-4(a+b)=(a+b)(a-b-4)
б) 2(x+y)-(x+y)^2=(x+y)(2-x-y)
1 . (a-b)×(a-b-4)
abo
(a-b)×(a+b)-4b-4a