Question

упростите выражение
(a-b)^2-(a+b)^2-17a-17b+17(a+b)+2b

Answer 1

(a-b-(a+b))(a-b+a+b)-17(a+b)+17(a+b)+2b=(a-b-a-b)*2a+2b=-4ab+2b

Answer 2

$(a-b)^{2} - (a+b)^{2} -17a+ 17(a+b)+2b= \\ = (a-b)^{2} - (a+b)^{2} - 17a +17a + 17b +2b= \\ =(-2b)*2a+17b+2b= \\ =-4ab +17b+2b= \\ =-4ab +19b$
Ответ: -4ab +19b