Question 301090
(x-9)(x-9)=90

+ / - (x-9)= sqrt90

+(x-9)=9.48

x1= 18.48

-(x-9)= 9.48

-x+9= = 9.48

-x= 9.48-9

-x2= 0.48
x2= - 0.48

x1 & x2 are the roots of the equation