SOLUTION: Solve for r. r^2 + 3r = 5. The solutions are r = ________.

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Question 130933: Solve for r.
r^2 + 3r = 5.
The solutions are r = ________.

Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
R^2+3R=5
R^2+3R-5=0
USING THE QUADRATIC EQUATION:
R%5E2%2B3R=5%0D%0AR%5E2%2B3R-5=0%0D%0AUSING+THE+QUADRATIC+EQUATION%3A%0D%0AR = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}
R=(-3+-SQRT[3^3-4*1*5])/1*2
R=(-3+-SQRT[9-20])/2
R=(-3+-SQRT29)/2
R=(-3+-5.385)/2
R=(-3+5.385)/2
R=2.385/2
R=1.19 ANSWER.
R=(-3-5.385)/2
R=-8.385/2
R=-4.19 ANSWER.