SOLUTION: P2-7p=30

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Question 627021: P2-7p=30

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
p%5E2+-+7p+=+30

p%5E2+-+7p+-+30+=+0

Now use the quadratic formula to solve for p:

p+=+%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F%282a%29

p+=+%28-%28-7%29%2B-sqrt%28%28-7%29%5E2-4%281%29%28-30%29%29%29%2F%282%281%29%29

p+=+%287%2B-sqrt%2849-%28-120%29%29%29%2F%282%29

p+=+%287%2B-sqrt%28169%29%29%2F2

p+=+%287%2Bsqrt%28169%29%29%2F2 or p+=+%287-sqrt%28169%29%29%2F2

p+=+%287%2B13%29%2F2 or p+=+%287-13%29%2F2

p+=+20%2F2 or p+=+-6%2F2

p+=+10 or p+=+-3

So the solutions are p+=+10 or p+=+-3