(x^2-5)^2+8(5-x^2)+16
问题描述：
(x^2-5)^2+8(5-x^2)+16
答
(x²-5)²+8(5-x²)+16=(x²-5)²-8(x²-5)+16=(x²-5-4) ²=(x²-9)²
答
(x^2-5)^2+8(x^2-5)+16
=(x^2-5+4)^2
=(x^2-1)^2
=(x+1)^2 *(x-1)^2
望采纳.