SOLUTION: Solve {{{ x^2+18x-4=0 }}} The solution for x is ?? please help

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Question 359056: Solve

+x%5E2%2B18x-4=0+

The solution for x is ??

please help
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
+x%5E2%2B18x-4=0+
Use the quadratic formula,
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
x+=+%28-18+%2B-+sqrt%28+%2818%29%5E2-4%2A1%2A%28-4%29+%29%29%2F%282%2A1%29+
x+=+%28-18+%2B-+sqrt%28+324%2B16+%29%29%2F%282%29+
x+=+%28-18+%2B-+sqrt%28+340%29%29%2F%282%29+
x+=+%28-18+%2B-+2%2Asqrt%28+85%29%29%2F%282%29+
Simplify the expression to get the final answer.