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## Homework Statement

An equation in a book lists this equation:

(c - 18)[tex]^{2}[/tex] = (-3[tex]\sqrt{c})[/tex][tex]^{2}[/tex]

And it simplifies it as:

c[tex]^{2}[/tex] -45c + 324 = 0

**2. The attempt at a solution**

When I do out the equation, I get:

c[tex]^{2}[/tex] + 324 = 9 + c

i squared c, then -18 for the left side of the equation, then for the right side, I squared -3 to get 9, then [tex]\sqrt{c}[/tex], which is c.

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