12 x^(2n+1)y^(m+1)- 20x^(n+1)y^ (2m+3)因式分解

问题描述:

12 x^(2n+1)y^(m+1)- 20x^(n+1)y^ (2m+3)因式分解

12 x^(2n+1)y^(m+1)- 20x^(n+1)y^ (2m+3)
=4x^(n+1)y^(m+1)(3x^n- 5y^ (m+2))