16+(x^2+4x)^2+8(x^2+4x)
问题描述:
16+(x^2+4x)^2+8(x^2+4x)
答
=(x^2+4x)^2+2*(x^2+4x)*4+4^2
=(x^2+4x+4)^2
=[(x+2)^2]^2
=(x+2)^4