(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

x的4次方减625

(x+5)(x^2+25)(x-5)
(x^2-25)(x^2+25)=0
x^2-5^2=0
x1=5;x2=-5

x^4-5^4

X

=x^4-625