7x-x^2=10 x=?
问题描述:
7x-x^2=10 x=?
答
7x-x^2=10
x^2-7x+10=0
(x-2)(x-5)=0
x=2或x=5
7x-x^2=10 x=?
7x-x^2=10
x^2-7x+10=0
(x-2)(x-5)=0
x=2或x=5