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1 March, 13:42

Solve the quadratic equation by completing the square.

x^2-18x+78=0

first, choose the appropriate form and fill in the blanks with the correct numbers.

a.) (x+?) ^2=?

or

b.) (x-?) ^2=?

then, solve the equation.

x=?

+1
Answers (1)
  1. 1 March, 17:24
    0
    Exact Form:

    x

    =

    9

    ±



    3

    Decimal Form:

    x

    =

    10.73205080

    ,

    7.26794919
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