7X-X^=12怎样解
问题描述:
7X-X^=12怎样解
答
x^2-7x+12=0
(x-3)(x-4)=0
x-3=0
x=3
x-4=0
x=4
7X-X^=12怎样解
x^2-7x+12=0
(x-3)(x-4)=0
x-3=0
x=3
x-4=0
x=4