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

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: how I solve this equation?, step by step? 6x²+x²=(18-x)²      Log On


   

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

Hi,

how I solve this equation:

6x%5E2+%2B+x%5E2+=+%2818-x%29%5E2+=+%2818-x%29%2818-x%29

I.  Expand

II. combine like terms and 

III. set to Zero

IV.  Use Quadratic formula x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+

 7x^2 = 324 - 36x +x^2  etc