Mathematics
Grade10
Easy

Question

Find the solution of quadratic equation x squared minus 8 equals 1 using square roots

  1. x equals plus-or-minus √ 1
  2. x equals plus-or-minus √ 9
  3. x equals plus-or-minus √ 0
  4. x equals √ 1

The correct answer is: x equals plus-or-minus √ 9


    x squared minus 8 equals 1
    Adding 8 on both the sides,
    x squared minus 8 plus 8 equals 1 plus 8
    Taking square root on both the sides of the equation, we get
    √ left parenthesis x squared right parenthesis equals plus-or-minus √ left parenthesis 1 plus 8 right parenthesis
    x equals plus-or-minus √ 9
    x equals plus-or-minus space 3

    Related Questions to study

    card img

    With Turito Academy.

    card img

    With Turito Foundation.

    card img

    Get an Expert Advice From Turito.

    Turito Academy

    card img

    With Turito Academy.

    Test Prep

    card img

    With Turito Foundation.