SOLUTION: Please help me understand this: (x+9)^2=64 I tried this: (x+9)^2=64 x^2+81=64 I'm not sure what to do from here. Do you subtract 81 from both sides or subtract 64? If you

Question 729512: Please help me understand this:
(x+9)^2=64
I tried this:
(x+9)^2=64
x^2+81=64
I'm not sure what to do from here.
Do you subtract 81 from both sides or subtract 64?
If you subtract 81 then it will be x^2=-17; how do I solve this?
I cannot use the quadratic function because the number you have to square root it by is a negative number and we haven't learned that yet so I don't think that is right.
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!

you tried this:

..this is incorrect not
try it this way:

....since exponents same, bases are same to, so we have
.....solve for

check:

RELATED QUESTIONS
Please help me solve this quadratic: 4(x+9)^2=24 What I've tried doing: 4(x+9)^2=24... (answered by sofiyac)

I need help completing the square for this problem. 16x^2-16x-5=0 So far I have... (answered by Msgenes)

hello there. can you please help me w/ this vectors hw question? it's from my "vectors as (answered by ikleyn)

Can you please explain to me how to solve this equation? I have tried to do it for an... (answered by KMST)

Please help not sure how to solve this equation.... (answered by Theo,MathLover1,MathTherapy)

I do not understand this problem ??? Use elimination to solve: x/2+2y=9 2x-y=18... (answered by longjonsilver)

Is the following trinomial a perfect square: x^2 - 6x + 9 I do not understand what... (answered by jim_thompson5910)

Please help me figure out how to simplify the following rational expression.... (answered by stanbon,queenofit)

I could really use some help on this problem please! I'm trying to find the diameter... (answered by jim_thompson5910,ikleyn)