4a的2m次方-16b的2n次方
问题描述:
4a的2m次方-16b的2n次方
答
4a的2m次方-16b的2n次方
=4(a^m)^2-16(b^n)^2
=4[(a^m)^2-(2b^n)^2]
=4(a^m-2b^n)(a^m+2b^n)