Ответ:
5a (x + y) - 4b (x + y); = (x+y)(5a-4b)
7a(c-d) - 2b (c-d). = (7a-2b)(c-d)
a(x²+y²)–b(x²+y²) = (x²+y²)(a-b)
x(a²–2b²)+y(a²–2b²)=(a²–2b²)(a+y)
a²(x–y)+b²(x–y) = (x–y)(a²+b²)
a²(x+y)–b²(x+y) = (a²-b²)(x+y)=(a-b)(a+b)(x+y)
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Ответ:
5a (x + y) - 4b (x + y); = (x+y)(5a-4b)
7a(c-d) - 2b (c-d). = (7a-2b)(c-d)
a(x²+y²)–b(x²+y²) = (x²+y²)(a-b)
x(a²–2b²)+y(a²–2b²)=(a²–2b²)(a+y)
a²(x–y)+b²(x–y) = (x–y)(a²+b²)
a²(x+y)–b²(x+y) = (a²-b²)(x+y)=(a-b)(a+b)(x+y)