Question

x=square root of 7x+18

Answer 1

I assume you mean:
\[y = \sqrt{7x+18}\]
is this accurate?

Answer 2

she has posted this in 3 places - and 'hasn't got time' to even square the equation. Now offline - presumably waiting for the answer to be delivered

Answer 3

And I believe it is x=sqrt(7x+18) which resolve to a simply factorised quadratic

Answer 4

yeh, after i wrote it, i realised that they werent asking about a nonreal function... sometimes I forget that basic/linear algebra is most of the people asking for help