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(x+3)(x+5)+x²-25
=(x+3)(x+5)+(x-5)(x+5)
=(x+3+x-5)(x+5)
=2(x-1)(x+5)
(c+b)(c-b)-a(a-2b)
=c²-b²-a²+2ab
=c²-(a-b)²
=(c+a+b)(c-a-b)
=(x+3)(x+5)+(x-5)(x+5)
=(x+3+x-5)(x+5)
=2(x-1)(x+5)
(c+b)(c-b)-a(a-2b)
=c²-b²-a²+2ab
=c²-(a-b)²
=(c+a+b)(c-a-b)
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