因式分解：m^2-10mn+25n^2+6m-30n+8
问题描述：
因式分解：m^2-10mn+25n^2+6m-30n+8
答
m^2-10mn+25n^2+6m-30n+8
=(m-5n)^2+6(m-5n)+8
=(m-5n+2)(m-5n+4)