-16x^2-x+225=0

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Solution for -16x^2-x+225=0 equation:


Simplifying
-16x2 + -1x + 225 = 0

Reorder the terms:
225 + -1x + -16x2 = 0

Solving
225 + -1x + -16x2 = 0

Solving for variable 'x'.

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

Divide each side by '-16'.
-14.0625 + 0.0625x + x2 = 0

Move the constant term to the right:

Add '14.0625' to each side of the equation.
-14.0625 + 0.0625x + 14.0625 + x2 = 0 + 14.0625

Reorder the terms:
-14.0625 + 14.0625 + 0.0625x + x2 = 0 + 14.0625

Combine like terms: -14.0625 + 14.0625 = 0.0000
0.0000 + 0.0625x + x2 = 0 + 14.0625
0.0625x + x2 = 0 + 14.0625

Combine like terms: 0 + 14.0625 = 14.0625
0.0625x + x2 = 14.0625

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 = 14.0625 + 0.0009765625

Reorder the terms:
0.0009765625 + 0.0625x + x2 = 14.0625 + 0.0009765625

Combine like terms: 14.0625 + 0.0009765625 = 14.0634765625
0.0009765625 + 0.0625x + x2 = 14.0634765625

Factor a perfect square on the left side:
(x + 0.03125)(x + 0.03125) = 14.0634765625

Calculate the square root of the right side: 3.750130206

Break this problem into two subproblems by setting 
(x + 0.03125) equal to 3.750130206 and -3.750130206.

Subproblem 1

x + 0.03125 = 3.750130206 Simplifying x + 0.03125 = 3.750130206 Reorder the terms: 0.03125 + x = 3.750130206 Solving 0.03125 + x = 3.750130206 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 = 3.750130206 + -0.03125 Combine like terms: 0.03125 + -0.03125 = 0.00000 0.00000 + x = 3.750130206 + -0.03125 x = 3.750130206 + -0.03125 Combine like terms: 3.750130206 + -0.03125 = 3.718880206 x = 3.718880206 Simplifying x = 3.718880206

Subproblem 2

x + 0.03125 = -3.750130206 Simplifying x + 0.03125 = -3.750130206 Reorder the terms: 0.03125 + x = -3.750130206 Solving 0.03125 + x = -3.750130206 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 = -3.750130206 + -0.03125 Combine like terms: 0.03125 + -0.03125 = 0.00000 0.00000 + x = -3.750130206 + -0.03125 x = -3.750130206 + -0.03125 Combine like terms: -3.750130206 + -0.03125 = -3.781380206 x = -3.781380206 Simplifying x = -3.781380206

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.718880206, -3.781380206}

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