Thread: Algebra Review

I cant make this problem work for whatever the reason is.
(2z)^(1/2)-(z+7)^(1/2)=1
For whatever reason i want to square all of it but then one i solve it down i get -6 and i know thats not right.
thanks to anyone
AC

Originally Posted by Casas4

I cant make this problem work for whatever the reason is.
(2z)^(1/2)-(z+7)^(1/2)=1
For whatever reason i want to square all of it but then one i solve it down i get -6 and i know thats not right.
thanks to anyone
AC

Get one term on the other side...

Then square. See if you can take it from there.

what is wrong with the graph to this equation?

+- the square root of 1-x^2

Ok so when i square root both sides do i square root (1+(z+7)^1/2 or just (z+7)^1/2
When i tried doing it (1 +((z+7)^1/2))^2 i still couldnt get it to work.
Sorry for whatever reason i cant make this problem work.

Originally Posted by Casas4

Ok so when i square root both sides do i square root (1+(z+7)^1/2 or just (z+7)^1/2
When i tried doing it (1 +((z+7)^1/2))^2 i still couldnt get it to work.
Sorry for whatever reason i cant make this problem work.

You're never going to square root anything in this problem. You're squaring both sides. For (1 +((z+7)^1/2))^2,
which is the same thing as , you have to use FOIL by splitting the square into 2 binomials. FOIL is the order of what terms to multiply when multiplying 2 binomials.

First - Multiply the first terms ( and )
Outer - Multiply the outer terms ( and )
Inner - Multiply the inner terms ( and )
Last - Multiply the last terms ( and )

Originally Posted by Weezy

what is wrong with the graph to this equation?

+- the square root of 1-x^2

Do not post new questions in existing threads. Start a new thread.
Do not ask for help in Live Chat. Live Chat (as it clearly states) is for small talk. (Against my better judgement I have edited an answer into your chat).
Your question here makes no sense - it requires more information.