-16x^2+40x-40=0

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Solution for -16x^2+40x-40=0 equation: 


Simplifying
-16x2 + 40x + -40 = 0

Reorder the terms:
-40 + 40x + -16x2 = 0

Solving
-40 + 40x + -16x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '8'.
8(-5 + 5x + -2x2) = 0

Ignore the factor 8.

Subproblem 1
Set the factor '(-5 + 5x + -2x2)' equal to zero and attempt to solve:

Simplifying
-5 + 5x + -2x2 = 0

Solving
-5 + 5x + -2x2 = 0

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

Divide each side by '-2'.
2.5 + -2.5x + x2 = 0

Move the constant term to the right:

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

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

Combine like terms: 2.5 + -2.5 = 0.0
0.0 + -2.5x + x2 = 0 + -2.5
-2.5x + x2 = 0 + -2.5

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

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 = -2.5 + 1.5625

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

Combine like terms: -2.5 + 1.5625 = -0.9375
1.5625 + -2.5x + x2 = -0.9375

Factor a perfect square on the left side:
(x + -1.25)(x + -1.25) = -0.9375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

This subproblem is being ignored because a solution could not be determined.

The solution to this equation could not be determined.

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