2x^2-28x+99=0

Solution for 2x^2-28x+99=0 equation:

Simplifying
2x2 + -28x + 99 = 0

Reorder the terms:
99 + -28x + 2x2 = 0

Solving
99 + -28x + 2x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
49.5 + -14x + x2 = 0

Move the constant term to the right:

Add '-49.5' to each side of the equation.
49.5 + -14x + -49.5 + x2 = 0 + -49.5

Reorder the terms:
49.5 + -49.5 + -14x + x2 = 0 + -49.5

Combine like terms: 49.5 + -49.5 = 0.0
0.0 + -14x + x2 = 0 + -49.5
-14x + x2 = 0 + -49.5

Combine like terms: 0 + -49.5 = -49.5
-14x + x2 = -49.5

The x term is -14x.  Take half its coefficient (-7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
-14x + 49 + x2 = -49.5 + 49

Reorder the terms:
49 + -14x + x2 = -49.5 + 49

Combine like terms: -49.5 + 49 = -0.5
49 + -14x + x2 = -0.5

Factor a perfect square on the left side:
(x + -7)(x + -7) = -0.5

Can't calculate square root of the right side.

The solution to this equation could not be determined.