(a+2b)²-8a(a+2b)+16a²,因式分解
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(a+2b)²-8a(a+2b)+16a²,因式分解
(a+2b)²-8a(a+2b)+16a²,因式分解
(a+2b)²-8a(a+2b)+16a²,因式分解
(a+2b)²-8a(a+2b)+16a²
=(a+2b-4a)²
=(2b-3a)²
逆用完全平方公式