(x+a)²—(x-a)²x三方—x²—12x5m²(a-b)—10m(a-b)²
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![(x+a)²—(x-a)²x三方—x²—12x5m²(a-b)—10m(a-b)²](/uploads/image/z/14690286-54-6.jpg?t=%EF%BC%88x%2Ba%29%26%23178%3B%E2%80%94%EF%BC%88x-a%29%26%23178%3Bx%E4%B8%89%E6%96%B9%E2%80%94x%26%23178%3B%E2%80%9412x5m%26%23178%3B%EF%BC%88a-b%29%E2%80%9410m%EF%BC%88a-b%29%26%23178%3B)
(x+a)²—(x-a)²x三方—x²—12x5m²(a-b)—10m(a-b)²
(x+a)²—(x-a)²
x三方—x²—12x
5m²(a-b)—10m(a-b)²
(x+a)²—(x-a)²x三方—x²—12x5m²(a-b)—10m(a-b)²
(x+a)²—(x-a)²
=(x+a+x-a)(x+a-x+a)
=(2x)(2a)
=4ax
x三方—x²—12x
=x(x²-x-12)
=x(x+3)(x-4)
5m²(a-b)—10m(a-b)²
=2m(a-b)[m-2(a-b)]
=2m(a+b)(m-2a+2b)