How do you solve #sqrt(y+9)=1?

1 Answer

color(red)(y=-8y=8

Explanation:

So, this is what you are starting with.

sqrt(y+color(red)(9))=color(red)(1y+9=1

The first step to solving a radical equation is to get red of the square root. (So square both sides).

(y+color(red)(9))=color(red)(1^2(y+9)=12
Then simplify.
(y+color(red)(9))=color(red)(1(y+9)=1

color(red)(y=1 - 9)y=19

color(red)(y = -8y=8