what does it mean to solve and check for extraneous solutions for sqry+9=1

Answer 1

You should write your equation as y^2 + 9 = 1.

First, solve your equation normally (by isolating y).

Then, to check for extraneous solutions, simply plug your answers into the original equation, and see if they check out. If one or more of your solutions does not work, then it is extraneous.