SOLUTION: can u solve this? 6r^3+7r^2=r thank you

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Question 40576: can u solve this?
6r^3+7r^2=r
thank you
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Solve:
6r%5E3%2B7r%5E2+=+r Factor an r from the left side.
r%286r%5E2%2B7r%29+=+r Divide both sides by r.
6r%5E2%2B7r+=+1 Subtract 1 from both sides.
6r%5E2%2B7r-1+=+0 Use the quadratic formula to solve x=%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F2a.
x+=+%28-7%2B-sqrt%287%5E2-4%286%29%28-1%29%29%29%2F2%286%29
x+=+%28-7%2B-sqrt%2849%2B24%29%29%2F12
x+=+%28-7%2B-sqrt%2873%29%29%2F12
The roots are:
x+=+%28-7+%2B+sqrt%2873%29%29%2F12
x+=+%28-7+-++sqrt%2873%29%29%2F12