SOLUTION: Solve the following equation for x by using the quadratic formula 8x^2+9x+2=0

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Question 279008: Solve the following equation for x by using the quadratic formula
8x^2+9x+2=0
Answer by Edwin McCravy(20054) About Me  (Show Source):
You can put this solution on YOUR website!

8x%5E2%2B9x%2B2=0

compare with the general quadratic, which you must memorize:

ax%5E2%2Bbx%2Bc=0

and see that a=8, b=9, and c=2

The quadratic formula, which you must also memorize, is:

x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+ 

Substituting those values:

x+=+%28-%289%29+%2B-+sqrt%28+%289%29%5E2-4%2A%288%29%2A%282%29+%29%29%2F%282%2A%288%29%29+ 

x+=+%28-9+%2B-+sqrt%28+81-64+%29%29%2F16+

x+=+%28-9+%2B-+sqrt%2817%29%29%2F16+

Edwin