(a+b)²+(a-b)²+(-2a-b)(a+2b)因式分解
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![(a+b)²+(a-b)²+(-2a-b)(a+2b)因式分解](/uploads/image/z/1268168-32-8.jpg?t=%28a%2Bb%29%26%23178%3B%2B%EF%BC%88a-b%EF%BC%89%26%23178%3B%2B%EF%BC%88-2a-b%EF%BC%89%EF%BC%88a%2B2b%EF%BC%89%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3)
(a+b)²+(a-b)²+(-2a-b)(a+2b)因式分解
(a+b)²+(a-b)²+(-2a-b)(a+2b)
因式分解
(a+b)²+(a-b)²+(-2a-b)(a+2b)因式分解
(a+b)²+(a-b)²+(-2a-b)(a+2b)
=2a²+2b²-(2a²+5ab+2b²)
=-5ab
=2A^2+2b^2-2A^2-2b^2-5AB=-5AB
(a+b)²+(a-b)²+(-2a-b)(a+2b)
=2a^2+2b^2-2a^2-ab-4ab-2b^2
=-5ab