(a²-b²) 3(a²-b²)-18 分解因式 急用!
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(a²-b²) 3(a²-b²)-18 分解因式 急用!
(a²-b²) 3(a²-b²)-18 分解因式 急用!
(a²-b²) 3(a²-b²)-18 分解因式 急用!
(a²-b²) -3(a²-b²)-18
=2(a²-b²)²-18
=2【(a²-b²)²-9】
=2(a²-b²+3)(a²-b²+3)
(a²-b²)3(a²-b²)-18
=3(a²-b²)²-18
=3【(a²-b²)²-6】
=3(a²-b²+√6)(a²-b²+√6)