SOLUTION: help please? solve by using the quadratic formula 2x - 4 = 1 - x^2

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Question 44074: help please? solve by using the quadratic formula 2x - 4 = 1 - x^2
Answer by adamchapman(301) About Me  (Show Source):
You can put this solution on YOUR website!
rearrang the equation so you have zero on one side of the "=" sign.
This should give x%5E2%2B2x-3=0
NOw use the quadratic solver x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
a = the amount of x squared's = 1
b = the amount of x's = 2
c = the number at the end = -3
put these values in the solver to get
x+=+%28-2+%2B-+sqrt%28+2%5E2-4%2A1%2A%28-3%29+%29%29%2F%282%2A1%29+
x+=+%28-2+%2B-+sqrt%28+4%2B12+%29%29%2F2+
x+=+%28-2+%2B-+sqrt%28+16+%29%29%2F2+
x+=+%28-2+%2B-+4%29%2F2+
x+=+-1+%2B-+2+
Therefore x=-3 or x=1
I hope this helps
P.S. I am trying to start up my own homework help website. I would be extremely grateful if you would e-mail me some feedback on the help you recieved to adam.chapman@student.manchester.ac.uk