SOLUTION: Hi, I am wondering if I could get some help with this question?? Solve for r r^2 + 3r=3 Thank you very much!!

Question 208257: Hi, I am wondering if I could get some help with this question??
Solve for r
r^2 + 3r=3
Thank you very much!!
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

Put in standard form (

)

The factors of -3 are 1 and -3 or -1 and 3, no summation of which results in +3, hence the quadratic is not factorable over the integers. Therefore, you must either complete the square or use the quadratic formula. Since the quadratic formula is nothing more than the general case of completing the square, let's use it:

For

So for

.

Since there are no perfect square factors of 21, this is simplest form.

John

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