(3a²+2a-8)²-(a²-2a-8)² 的因式分解.
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(3a²+2a-8)²-(a²-2a-8)² 的因式分解.
(3a²+2a-8)²-(a²-2a-8)² 的因式分解.
(3a²+2a-8)²-(a²-2a-8)² 的因式分解.
=[(3a²+2a-8)-(a²-2a-8)][(3a²+2a-8)²+(a²-2a-8)]
=(2a^2+4a)(4a^2-16)
=2a(a+4)[(2a)^2-4^2]
=2a(a+4)(2a+4)2a-4)