4x^2+.25x-1.125=0

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Solution for 4x^2+.25x-1.125=0 equation:


Simplifying
4x2 + 0.25x + -1.125 = 0

Reorder the terms:
-1.125 + 0.25x + 4x2 = 0

Solving
-1.125 + 0.25x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
-0.28125 + 0.0625x + x2 = 0

Move the constant term to the right:

Add '0.28125' to each side of the equation.
-0.28125 + 0.0625x + 0.28125 + x2 = 0 + 0.28125

Reorder the terms:
-0.28125 + 0.28125 + 0.0625x + x2 = 0 + 0.28125

Combine like terms: -0.28125 + 0.28125 = 0.00000
0.00000 + 0.0625x + x2 = 0 + 0.28125
0.0625x + x2 = 0 + 0.28125

Combine like terms: 0 + 0.28125 = 0.28125
0.0625x + x2 = 0.28125

The x term is 0.0625x.  Take half its coefficient (0.03125).
Square it (0.0009765625) and add it to both sides.

Add '0.0009765625' to each side of the equation.
0.0625x + 0.0009765625 + x2 = 0.28125 + 0.0009765625

Reorder the terms:
0.0009765625 + 0.0625x + x2 = 0.28125 + 0.0009765625

Combine like terms: 0.28125 + 0.0009765625 = 0.2822265625
0.0009765625 + 0.0625x + x2 = 0.2822265625

Factor a perfect square on the left side:
(x + 0.03125)(x + 0.03125) = 0.2822265625

Calculate the square root of the right side: 0.53125

Break this problem into two subproblems by setting 
(x + 0.03125) equal to 0.53125 and -0.53125.

Subproblem 1

x + 0.03125 = 0.53125 Simplifying x + 0.03125 = 0.53125 Reorder the terms: 0.03125 + x = 0.53125 Solving 0.03125 + x = 0.53125 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.03125' to each side of the equation. 0.03125 + -0.03125 + x = 0.53125 + -0.03125 Combine like terms: 0.03125 + -0.03125 = 0.00000 0.00000 + x = 0.53125 + -0.03125 x = 0.53125 + -0.03125 Combine like terms: 0.53125 + -0.03125 = 0.5 x = 0.5 Simplifying x = 0.5

Subproblem 2

x + 0.03125 = -0.53125 Simplifying x + 0.03125 = -0.53125 Reorder the terms: 0.03125 + x = -0.53125 Solving 0.03125 + x = -0.53125 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.03125' to each side of the equation. 0.03125 + -0.03125 + x = -0.53125 + -0.03125 Combine like terms: 0.03125 + -0.03125 = 0.00000 0.00000 + x = -0.53125 + -0.03125 x = -0.53125 + -0.03125 Combine like terms: -0.53125 + -0.03125 = -0.5625 x = -0.5625 Simplifying x = -0.5625

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.5, -0.5625}

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