SOLUTION: solve the equation by completeing the square x^2+2x=15

SOLUTION: solve the equation by completeing the square x^2+2x=15

Algebra.Com

Question 437260: solve the equation by completeing the square x^2+2x=15

Answer by Gogonati(855) (Show Source): You can put this solution on YOUR website!
Add +1 on both sides of equation.
, complete the square on the left side.
, by the square root definition we write: x+1=+/- sqrt(16)
x+1=4 => x=3 and x+1=-4 => x=-5.
Done.
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