1.x^2-81=0求x的值2.36x^2-16=0求x的值3.（x-10^2=100求x的值4.3（x-1）^2=363求x的值全用根号求

Question

1.x^2-81=0求x的值 2.36x^2-16=0求x的值 3.（x-10^2=100求x的值 4.3（x-1）^2=363求x的值 全用根号求

Answer 1

x^2-81=0求x的值
x=±√81=±9
2.36x^2-16=0求x的值
36x^2=16
x^2=16/36
x=±√(16/36)=±2/3
3.（x-10）^2=100求x的值
x-10=±√100
x-10=±10
x1=20,x2=0
4.3（x-1）^2=363求x的值
（x-1）^2=121
x-1=±√121
x-1=±11
x1=12,x2=-10