SOLUTION: Solve by using the quadratic formula: x2 + 7x = -3.

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Question 287661: Solve by using the quadratic formula: x2 + 7x = -3.
Answer by texttutoring(324) About Me  (Show Source):
You can put this solution on YOUR website!

Set the right side of the equation to zero by adding 3 to both sides of the equation:
x%5E2%2B7x%2B3=0
The quadratic formula is:
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+

In your question
a=1
b=7
c=3
x+=+%28-7+%2B-+sqrt%28+7%5E2-4%2A1%2A3+%29%29%2F%282%2A1%29+
x+=+%28-7+%2B-+sqrt%28+49-12+%29%29%2F%282%29+
x+=+%28-7+%2B-+sqrt%28+37+%29%29%2F%282%29+

To be exact, you can leave your answer like that, with the radicals. Note that you have two answers, one for the + sign and one for the - sign.

If you want to write your answers as decimals, they would be:

x=-0.4586 or x=-6.541