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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.
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3 votes
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=?

User Saulo Vallory
by
5.2k points

1 Answer

6 votes

Exact Form:

x

=

9

±

√

3

Decimal Form:

x

=

10.73205080

,

7.26794919

User Harinder
by
5.0k points
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