3a(b2+9)2-108axb2因式分解
问题描述:
3a(b2+9)2-108axb2因式分解
答
3a(b²+9)²-108ab²
=3a[(b²+9)²-36b²]
=3a(b²+9+6b)(b²+9-6b)
=3a(b+3)²(b-3)²