SOLUTION: x- 7square root of x+6=0. I must solve this equation(i.e. x=4 or6).

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: x- 7square root of x+6=0. I must solve this equation(i.e. x=4 or6).      Log On


   

Question 88155: x- 7square root of x+6=0. I must solve this equation(i.e. x=4 or6).
Answer by longjonsilver(2297) About Me  (Show Source):
You can put this solution on YOUR website!
it doesn't look like much like this: +x+-+7sqrt%28x%29+%2B+6+=+0+. However, let +y=sqrt%28x%29+, which means that +y%5E2+=+x+. We now can re-write this as: +y%5E2+-+7y+%2B+6+=+0+ which is a quadratic you can solve by factorisation. Once you have your answers for y, put them into +y%5E2+=+x+ to find your values for x.

cheers
Jon