SOLUTION: I am stuck on this problem. I did the equation and my answer was y=0,y=9. The problem is to use factoring to solve the equation. 2y^2-162=0 If I'm correct, yea for me!

Question 153542This question is from textbook Intermediate Algebra
: I am stuck on this problem. I did the equation and my answer was y=0,y=9. The problem is to use factoring to solve the equation. 2y^2-162=0
If I'm correct, yea for me! This question is from textbook Intermediate Algebra

Found 3 solutions by Fombitz, stanbon, josmiceli:
Answer by Fombitz(32388)   (Show Source): You can put this solution on YOUR website!
Easiest way is to plug your answer in the original equation.

Untrue.
y=0 is not a solution.
.
.
.

True.
y=9 is a solution.
.
.
.
You're missing an answer.

You forgot (-9).
.
.
.
Here's a graph of the function.

Answer by stanbon(75887)   (Show Source): You can put this solution on YOUR website!
Also y = -9.
Cheers,
Stan H.
Answer by josmiceli(19441)   (Show Source): You can put this solution on YOUR website!

I know how to solve it, but I'm not sure what the
"factoring" is about. I guess it means to factor out a
from the left side like this:

Now if I divide both sides by , I get
(since )

Take the square root of both sides

and

I think you were half right
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