-16x^2+16x+0=2.56

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Solution for -16x^2+16x+0=2.56 equation:


Simplifying
-16x2 + 16x + 0 = 2.56

Reorder the terms:
0 + 16x + -16x2 = 2.56
Remove the zero:
16x + -16x2 = 2.56

Solving
16x + -16x2 = 2.56

Solving for variable 'x'.

Reorder the terms:
-2.56 + 16x + -16x2 = 2.56 + -2.56

Combine like terms: 2.56 + -2.56 = 0.00
-2.56 + 16x + -16x2 = 0.00

Begin completing the square.  Divide all terms by
-16 the coefficient of the squared term: 

Divide each side by '-16'.
0.16 + -1x + x2 = 0.00

Move the constant term to the right:

Add '-0.16' to each side of the equation.
0.16 + -1x + -0.16 + x2 = 0.00 + -0.16

Reorder the terms:
0.16 + -0.16 + -1x + x2 = 0.00 + -0.16

Combine like terms: 0.16 + -0.16 = 0.00
0.00 + -1x + x2 = 0.00 + -0.16
-1x + x2 = 0.00 + -0.16

Combine like terms: 0.00 + -0.16 = -0.16
-1x + x2 = -0.16

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = -0.16 + 0.25

Reorder the terms:
0.25 + -1x + x2 = -0.16 + 0.25

Combine like terms: -0.16 + 0.25 = 0.09
0.25 + -1x + x2 = 0.09

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 0.09

Calculate the square root of the right side: 0.3

Break this problem into two subproblems by setting 
(x + -0.5) equal to 0.3 and -0.3.

Subproblem 1

x + -0.5 = 0.3 Simplifying x + -0.5 = 0.3 Reorder the terms: -0.5 + x = 0.3 Solving -0.5 + x = 0.3 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 0.3 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 0.3 + 0.5 x = 0.3 + 0.5 Combine like terms: 0.3 + 0.5 = 0.8 x = 0.8 Simplifying x = 0.8

Subproblem 2

x + -0.5 = -0.3 Simplifying x + -0.5 = -0.3 Reorder the terms: -0.5 + x = -0.3 Solving -0.5 + x = -0.3 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -0.3 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -0.3 + 0.5 x = -0.3 + 0.5 Combine like terms: -0.3 + 0.5 = 0.2 x = 0.2 Simplifying x = 0.2

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.8, 0.2}

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