SOLUTION: Solve. x^2 + 18 - 4 = 0

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Question 317504: Solve.
x^2 + 18 - 4 = 0
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E2+%2B+18+-+4+=+0
x%5E2+%2B+14+=+0
x%5E2+=-14
highlight%28x=0+%2B-+sqrt%2814%29i%29 where i=sqrt%28-1%29
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If you meant x%5E2+%2B+18x+-+4+=0, then
x%5E2+%2B+18x+-+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+18%5E2-4%2A1%2A%28-4%29+%29%29%2F%282%2A1%29+
x+=+%28-18+%2B-+sqrt%28+324%2B16+%29%29%2F2+
x+=+%28-18+%2B-+sqrt%28+340%29%29%2F2+
x+=+%28-18+%2B-+2sqrt%28+85%29%29%2F2+
highlight%28x+=+-9+%2B-+sqrt%28+85%29%29+