因式分解:2a的平方-4ab-3b的平方

3个回答

=2(a²-2ab-3b²/2)
=2(a²-2ab+b²-5b²/2)
=2[(a-b)²-10b²/4]
=2(a-b+√10b/2)(a-b-√10b/2)