因式分解(x-2)^2-3(x+2)(2-x) 因式分解a^2b^2(a+b)-10ab(a+b)+25(a+b)

(x-2)²-3(x+2)(2-x)
=(x-2)²+3(x+2)(x-2)
=(x-2)[(x-2)+3(x+2)]
=(x-2)(4x+4)
=4(x-2)(x+1)
a²b²(a+b)-10ab(a+b)+25(a+b)
=(a+b)(a²b²-10ab+25)
=(a+b)(ab-5)²
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