SOLUTION: Ok here is my 3rd question for the day. Solve the equation: x^2-225=0 do i add 225 to both sides to start out? Thanks so much!!

Question 111205This question is from textbook university of Phoenix Elementary and Intermediate Algebra
: Ok here is my 3rd question for the day.
Solve the equation:
x^2-225=0
do i add 225 to both sides to start out?
Thanks so much!! This question is from textbook university of Phoenix Elementary and Intermediate Algebra

Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

:
Yes, adding 225 to both sides is the correct first step.
:

:
Then take the square root of both sides, remembering to consider both the positive and negative square roots.
:
or
:
There is another way to solve this one, and that is to recognize that you are dealing with the difference of two squares, i.e. .
Hence:

Giving you the same result:
or
RELATED QUESTIONS
Please help me with my Algebra 2 math homework. I just need help on one question: how... (answered by mananth,Alan3354,stanbon)

Solve the following equation on the interval [0, 360 degrees]: sin2x=1 This is what... (answered by ikleyn,greenestamps)

solve for x: (8+x)^-3=64. Do I raise both sides to the -3rd... (answered by nabla)

I have the following problem. I will be honest, it is for homework, so the answer is not... (answered by stanbon,ankor@dixie-net.com,Fombitz)

Solve the quadratic equation by completing the square: 4(x)^2 � 12(x) � 55 = 0 (answered by edjones)

Solve by the substitution method. I have part of this I will add it here and hopefully... (answered by scott8148)

solve the following equation for 0 greater than or equal to x greater than 360.... (answered by ikleyn)

Hi. I had a question about solving this log problem. I asked this a few hours so I'm... (answered by josgarithmetic)

I am trying to understand if the equation I have done is anywhere near correct. I think... (answered by ReadingBoosters,MathTherapy)