0=0.25x^2-5x+80

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Solution for 0=0.25x^2-5x+80 equation:


Simplifying
0 = 0.25x2 + -5x + 80

Reorder the terms:
0 = 80 + -5x + 0.25x2

Solving
0 = 80 + -5x + 0.25x2

Solving for variable 'x'.

Combine like terms: 0 + -80 = -80
-80 + 5x + -0.25x2 = 80 + -5x + 0.25x2 + -80 + 5x + -0.25x2

Reorder the terms:
-80 + 5x + -0.25x2 = 80 + -80 + -5x + 5x + 0.25x2 + -0.25x2

Combine like terms: 80 + -80 = 0
-80 + 5x + -0.25x2 = 0 + -5x + 5x + 0.25x2 + -0.25x2
-80 + 5x + -0.25x2 = -5x + 5x + 0.25x2 + -0.25x2

Combine like terms: -5x + 5x = 0
-80 + 5x + -0.25x2 = 0 + 0.25x2 + -0.25x2
-80 + 5x + -0.25x2 = 0.25x2 + -0.25x2

Combine like terms: 0.25x2 + -0.25x2 = 0.00
-80 + 5x + -0.25x2 = 0.00

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

Divide each side by '-0.25'.
320 + -20x + x2 = 0

Move the constant term to the right:

Add '-320' to each side of the equation.
320 + -20x + -320 + x2 = 0 + -320

Reorder the terms:
320 + -320 + -20x + x2 = 0 + -320

Combine like terms: 320 + -320 = 0
0 + -20x + x2 = 0 + -320
-20x + x2 = 0 + -320

Combine like terms: 0 + -320 = -320
-20x + x2 = -320

The x term is -20x.  Take half its coefficient (-10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
-20x + 100 + x2 = -320 + 100

Reorder the terms:
100 + -20x + x2 = -320 + 100

Combine like terms: -320 + 100 = -220
100 + -20x + x2 = -220

Factor a perfect square on the left side:
(x + -10)(x + -10) = -220

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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