SOLUTION: solve the following quadratic equation by using formula 2x² + 8x +7 =0 ? can I also be shown a checking method to show that my answer is correct

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Question 1029450: solve the following quadratic equation by using formula
2x² + 8x +7 =0 ?
can I also be shown a checking method to show that my answer is correct
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
2x² + 8x +7 = 0
The quadratic formula
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
In this equation a=2; b=8; c=7
x+=+%28-8+%2B-+sqrt%288%5E2-4%2A2%2A7+%29%29%2F%282%2A2%29+
x+=+%28-8+%2B-+sqrt%2864-56%29%29%2F4+
x+=+%28-8+%2B-+sqrt%288%29%29%2F4+
Two solutions
x = %28-8+%2B+2.828%29%2F4
x = -1.2929
and
x = %28-8+-+2.828%29%2F4
x = -2.707
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You can check your solutions in the original equation, replacing x and see if the results are 0 or very close to it since we have decimal solutions