SOLUTION: I need to solve this by factoring: {{{ x^2-9=0 }}}

SOLUTION: I need to solve this by factoring: {{{ x^2-9=0 }}}

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Question 328254: I need to solve this by factoring:
Answer by meay7c(10) (Show Source): You can put this solution on YOUR website!
The first step is to isolate x.

Add 9 to both sides yielding:

Simplify:

To undo the squaring operation we must take the square root of x and take the square root of 9 as well.

Now we have:

x = + or - 3.
Check our solutions by plugging our x values into the original equation:

Where x = 3

9 - 9 = 0 Yes!!!
and
Where x = -3

*Remember any negative number squared yields a positive answer.
9 - 9 = 0 Yes!!!
Good Luck :-)

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