7.2*x^2-28*x+28=0

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Solution for 7.2*x^2-28*x+28=0 equation:


Simplifying
7.2x2 + -28x + 28 = 0

Reorder the terms:
28 + -28x + 7.2x2 = 0

Solving
28 + -28x + 7.2x2 = 0

Solving for variable 'x'.

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

Divide each side by '7.2'.
3.888888889 + -3.888888889x + x2 = 0

Move the constant term to the right:

Add '-3.888888889' to each side of the equation.
3.888888889 + -3.888888889x + -3.888888889 + x2 = 0 + -3.888888889

Reorder the terms:
3.888888889 + -3.888888889 + -3.888888889x + x2 = 0 + -3.888888889

Combine like terms: 3.888888889 + -3.888888889 = 0.000000000
0.000000000 + -3.888888889x + x2 = 0 + -3.888888889
-3.888888889x + x2 = 0 + -3.888888889

Combine like terms: 0 + -3.888888889 = -3.888888889
-3.888888889x + x2 = -3.888888889

The x term is -3.888888889x.  Take half its coefficient (-1.944444445).
Square it (3.780864200) and add it to both sides.

Add '3.780864200' to each side of the equation.
-3.888888889x + 3.780864200 + x2 = -3.888888889 + 3.780864200

Reorder the terms:
3.780864200 + -3.888888889x + x2 = -3.888888889 + 3.780864200

Combine like terms: -3.888888889 + 3.780864200 = -0.108024689
3.780864200 + -3.888888889x + x2 = -0.108024689

Factor a perfect square on the left side:
(x + -1.944444445)(x + -1.944444445) = -0.108024689

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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