20x-8x^2-25=0

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Solution for 20x-8x^2-25=0 equation:


Simplifying
20x + -8x2 + -25 = 0

Reorder the terms:
-25 + 20x + -8x2 = 0

Solving
-25 + 20x + -8x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-8 the coefficient of the squared term: 

Divide each side by '-8'.
3.125 + -2.5x + x2 = 0

Move the constant term to the right:

Add '-3.125' to each side of the equation.
3.125 + -2.5x + -3.125 + x2 = 0 + -3.125

Reorder the terms:
3.125 + -3.125 + -2.5x + x2 = 0 + -3.125

Combine like terms: 3.125 + -3.125 = 0.000
0.000 + -2.5x + x2 = 0 + -3.125
-2.5x + x2 = 0 + -3.125

Combine like terms: 0 + -3.125 = -3.125
-2.5x + x2 = -3.125

The x term is -2.5x.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5x + 1.5625 + x2 = -3.125 + 1.5625

Reorder the terms:
1.5625 + -2.5x + x2 = -3.125 + 1.5625

Combine like terms: -3.125 + 1.5625 = -1.5625
1.5625 + -2.5x + x2 = -1.5625

Factor a perfect square on the left side:
(x + -1.25)(x + -1.25) = -1.5625

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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