SOLUTION: Solve by completing the square: x^2+4x=7

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: Solve by completing the square: x^2+4x=7      Log On


   

Question 361804: Solve by completing the square:
x^2+4x=7
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!




Divide the coefficient on the 1st degree term by 2, square the result, then add that result to both sides.



Factor the perfect square trinomial in the LHS:



Take the square root of both sides:



Add the opposite of the constant term in the LHS to both sides:



John

My calculator said it, I believe it, that settles it
The Out Campaign: Scarlet Letter of Atheism