Ask Question
17 October, 23:11

Find the solutions to the equation by compelting the square x^2-6x=7

+5
Answers (2)
  1. 17 October, 23:30
    0
    To complete the square x^2-6x=7

    We take the coefficient of X which is - 6

    divide it by 2 - 3

    square that number 9

    then add it to both sides of the equation.

    x^2 - 6x + 9 = 16

    (x - 3) * (x - 3) = 16

    We take the square root of both sides:

    a) x-3 = 4

    b) x-3 = - 4

    Therefore, x = 7 and x = - 1
  2. 18 October, 01:28
    0
    The solution set is {-1, 7}

    Step-by-step explanation:

    Rewrite x^2-6x=7 as x^2 - 6x = 7.

    Identify the coefficient of the x term; it is - 6.

    Halve this coeff (obtaining - 3)

    Square this result (obtaining 9)

    Add 9 to x^2 - 6x and then subtract 9 from the result: x^2 - 6x + 9 - 9

    Then we have:

    x^2 - 6x + 9 - 9 = 7. Add 9 to both sides, obtaining

    x^2 - 6x + 9 = 16

    Rewrite x^2 - 6x + 9 as the square of a binomial: (x - 3) ^2

    Then we have

    (x - 3) ^2 = 16

    Taking the square root of both sides, we get

    x - 3 = ±4, so that: x = 3 + 4 = 7, and x = 3 - 4 = - 1.

    The solution set is {-1, 7}.
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “Find the solutions to the equation by compelting the square x^2-6x=7 ...” in 📙 Mathematics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers