因式分解1/2(5a+3b)²-a(5a+3b)+1/2a²

问题描述:

因式分解1/2(5a+3b)²-a(5a+3b)+1/2a²

原式=1/2[(5a+3b)²-2a(5a+3b)+a²]
=1/2(5a+3b-a)²
=1/2(4a+3b)²