.25x^2-20x+800=0

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Solution for .25x^2-20x+800=0 equation:


Simplifying
0.25x2 + -20x + 800 = 0

Reorder the terms:
800 + -20x + 0.25x2 = 0

Solving
800 + -20x + 0.25x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.25'.
3200 + -80x + x2 = 0

Move the constant term to the right:

Add '-3200' to each side of the equation.
3200 + -80x + -3200 + x2 = 0 + -3200

Reorder the terms:
3200 + -3200 + -80x + x2 = 0 + -3200

Combine like terms: 3200 + -3200 = 0
0 + -80x + x2 = 0 + -3200
-80x + x2 = 0 + -3200

Combine like terms: 0 + -3200 = -3200
-80x + x2 = -3200

The x term is -80x.  Take half its coefficient (-40).
Square it (1600) and add it to both sides.

Add '1600' to each side of the equation.
-80x + 1600 + x2 = -3200 + 1600

Reorder the terms:
1600 + -80x + x2 = -3200 + 1600

Combine like terms: -3200 + 1600 = -1600
1600 + -80x + x2 = -1600

Factor a perfect square on the left side:
(x + -40)(x + -40) = -1600

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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