Algebra 2

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solve the equation:

x^2-x+2=0

is 1+9i/2 the correct answer?

  • Algebra 2 -

    No, that is not the answer I get when I plug in to the quadratic formula.

    I get
    (1 + sqrt7i)/2

    and

    (1 - sqrt7i)/2

    Do you understand how I got this?

  • Algebra 2 -

    Where does the seven come from?

  • Algebra 2 -

    sqrt(b^2 - 4ac).

    b is -1 and a is 1 and c is 2.

    So, sqrt(b^2 - 4ac) is

    sqrt(-7), or (sqrt7)i.

  • Algebra 2 -

    ohhhh! okay thank you!

  • Algebra 2 -

    You're welcome

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