SOLUTION: another help please? :( x^2-3x-40=0

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Question 641777: another help please? :(
x^2-3x-40=0
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Use the quadratic formula to solve for x

Note: in the case of x%5E2-3x-40, a = 1, b = -3 and c = -40

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

x+=+%28-%28-3%29%2B-sqrt%28%28-3%29%5E2-4%281%29%28-40%29%29%29%2F%282%281%29%29

x+=+%283%2B-sqrt%289-%28-160%29%29%29%2F%282%29

x+=+%283%2B-sqrt%289%2B160%29%29%2F%282%29

x+=+%283%2B-sqrt%28169%29%29%2F2

x+=+%283%2Bsqrt%28169%29%29%2F2 or x+=+%283-sqrt%28169%29%29%2F2

x+=+%283%2B13%29%2F2 or x+=+%283-13%29%2F2

x+=+16%2F2 or x+=+-10%2F2

x+=+8 or x+=+-5


So the solutions are x+=+8 or x+=+-5