SOLUTION: how I solve this equation?, step by step? 6x²+x²=(18-x)²

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Question 622808: how I solve this equation?, step by step? 6x²+x²=(18-x)²
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!
 
Hi,
how I solve this equation:

I. Expand
II. combine like terms and
III. set to Zero
IV. Use Quadratic formula
7x^2 = 324 - 36x +x^2 etc

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