SOLUTION: solve for r r^2 + 3r = 1

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Question 394748: solve for r
r^2 + 3r = 1
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
The standard form of the equation is r%5E2+%2B+3r+-+1+=+0.
Now let a = 1, b = 3, and c = -1, use the quadratic formula, and simplify:
r+=+%28-b+%2B-+sqrt%28+b%5E2-4ac+%29%29%2F%282a%29+ .
Good luck!