Posted by **louis** on Thursday, January 1, 2009 at 2:54pm.

7n + the squareroot of n =18

- algebra -
**bobpursley**, Thursday, January 1, 2009 at 4:23pm
It might help for you to let x^2=n, then

7x^2+x-18=0

which can be solved by use of the quadratic equation, then when you have x, square it, and you have n.

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