Question

If y^2=18y-81 what is the value of y

Answer 1

y=9

Explanation:

y^2=18y-81

y^2-18y+81=0

y^2-9y-9y+81=0

y(y-9)-9(y-9)=0

(y-9)(y-9)=0

(y-9)^2=0

So the value of y is 9

I hope it will help you:)