0.25=-.5(32x^2)+20x+3

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Solution for 0.25=-.5(32x^2)+20x+3 equation:


Simplifying
0.25 = -0.5(32x2) + 20x + 3

Remove parenthesis around (32x2)
0.25 = -0.5 * 32x2 + 20x + 3

Multiply -0.5 * 32
0.25 = -16x2 + 20x + 3

Reorder the terms:
0.25 = 3 + 20x + -16x2

Solving
0.25 = 3 + 20x + -16x2

Solving for variable 'x'.

Combine like terms: 0.25 + -3 = -2.75
-2.75 + -20x + 16x2 = 3 + 20x + -16x2 + -3 + -20x + 16x2

Reorder the terms:
-2.75 + -20x + 16x2 = 3 + -3 + 20x + -20x + -16x2 + 16x2

Combine like terms: 3 + -3 = 0
-2.75 + -20x + 16x2 = 0 + 20x + -20x + -16x2 + 16x2
-2.75 + -20x + 16x2 = 20x + -20x + -16x2 + 16x2

Combine like terms: 20x + -20x = 0
-2.75 + -20x + 16x2 = 0 + -16x2 + 16x2
-2.75 + -20x + 16x2 = -16x2 + 16x2

Combine like terms: -16x2 + 16x2 = 0
-2.75 + -20x + 16x2 = 0

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

Divide each side by '16'.
-0.171875 + -1.25x + x2 = 0

Move the constant term to the right:

Add '0.171875' to each side of the equation.
-0.171875 + -1.25x + 0.171875 + x2 = 0 + 0.171875

Reorder the terms:
-0.171875 + 0.171875 + -1.25x + x2 = 0 + 0.171875

Combine like terms: -0.171875 + 0.171875 = 0.000000
0.000000 + -1.25x + x2 = 0 + 0.171875
-1.25x + x2 = 0 + 0.171875

Combine like terms: 0 + 0.171875 = 0.171875
-1.25x + x2 = 0.171875

The x term is -1.25x.  Take half its coefficient (-0.625).
Square it (0.390625) and add it to both sides.

Add '0.390625' to each side of the equation.
-1.25x + 0.390625 + x2 = 0.171875 + 0.390625

Reorder the terms:
0.390625 + -1.25x + x2 = 0.171875 + 0.390625

Combine like terms: 0.171875 + 0.390625 = 0.5625
0.390625 + -1.25x + x2 = 0.5625

Factor a perfect square on the left side:
(x + -0.625)(x + -0.625) = 0.5625

Calculate the square root of the right side: 0.75

Break this problem into two subproblems by setting 
(x + -0.625) equal to 0.75 and -0.75.

Subproblem 1

x + -0.625 = 0.75 Simplifying x + -0.625 = 0.75 Reorder the terms: -0.625 + x = 0.75 Solving -0.625 + x = 0.75 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.625' to each side of the equation. -0.625 + 0.625 + x = 0.75 + 0.625 Combine like terms: -0.625 + 0.625 = 0.000 0.000 + x = 0.75 + 0.625 x = 0.75 + 0.625 Combine like terms: 0.75 + 0.625 = 1.375 x = 1.375 Simplifying x = 1.375

Subproblem 2

x + -0.625 = -0.75 Simplifying x + -0.625 = -0.75 Reorder the terms: -0.625 + x = -0.75 Solving -0.625 + x = -0.75 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.625' to each side of the equation. -0.625 + 0.625 + x = -0.75 + 0.625 Combine like terms: -0.625 + 0.625 = 0.000 0.000 + x = -0.75 + 0.625 x = -0.75 + 0.625 Combine like terms: -0.75 + 0.625 = -0.125 x = -0.125 Simplifying x = -0.125

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.375, -0.125}

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