(x+5)(x方+25)(x-5) 等于多少
问题描述:
(x+5)(x方+25)(x-5) 等于多少
答
x的4次方减625
答
(x+5)(x^2+25)(x-5)
(x^2-25)(x^2+25)=0
x^2-5^2=0
x1=5;x2=-5
答
x^4-5^4
答
X
答
=x^4-625