Ask Question
18 June, 20:23

Solve this quadratic equation by completing the square.

x2 + 6x = 18

+5
Answers (1)
  1. 18 June, 20:34
    0
    x=3sqrt3-3; x=-3sqrt3-3

    Step-by-step explanation:

    solve for a, 2ax=6x; a=3:

    x^2+6x+3^2=18+3^2

    Simplify, 18+3^2=27:

    x^2+6x+3^2=27

    Complete square: (x+3) ^2=27

    Two answers: x+3=sqrt27; x+3=-sqrt27

    Therefore, x=3sqrt3-3; x=-3sqrt3-3
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “Solve this quadratic equation by completing the square. x2 + 6x = 18 ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers