document.write( "Question 88155: x- 7square root of x+6=0. I must solve this equation(i.e. x=4 or6). \n" ); document.write( "

Algebra.Com's Answer #63993 by longjonsilver(2297) $\"\"$ $\"About$

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.\r
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