SOLUTION: Please help me solve this equation:{{{ x^2+3x-5=0 }}}

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Question 148240: Please help me solve this equation:++x%5E2%2B3x-5=0++
Answer by Edwin McCravy(20054) About Me  (Show Source):
You can put this solution on YOUR website!
Please help me solve this equation:++x%5E2%2B3x-5=0++

The solution to

Ax%5E2%2BBx%2BC=0

is

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

Write your problem this way:

1x%5E2%2B3x-5=0++

Compare to

Ax%5E2%2BBx%2BC=0

and see that A=1, B=3 and C=-5

Substituting:

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

x+=+%28-%283%29+%2B-+sqrt%28+%283%29%5E2-4%281%29%28-5%29+%29%29%2F%282%281%29%29+

x+=+%28-3+%2B-+sqrt%28+9%2B20+%29%29%2F2+

x+=+%28-3+%2B-+sqrt%28+29+%29%29%2F2+

So there are two solutions:

x+=+%28-3+%2B+sqrt%28+29+%29%29%2F2+ and x+=+%28-3+-+sqrt%28+29+%29%29%2F2+

Edwin