16x^2+3x-124=0

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Solution for 16x^2+3x-124=0 equation:


Simplifying
16x2 + 3x + -124 = 0

Reorder the terms:
-124 + 3x + 16x2 = 0

Solving
-124 + 3x + 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'.
-7.75 + 0.1875x + x2 = 0

Move the constant term to the right:

Add '7.75' to each side of the equation.
-7.75 + 0.1875x + 7.75 + x2 = 0 + 7.75

Reorder the terms:
-7.75 + 7.75 + 0.1875x + x2 = 0 + 7.75

Combine like terms: -7.75 + 7.75 = 0.00
0.00 + 0.1875x + x2 = 0 + 7.75
0.1875x + x2 = 0 + 7.75

Combine like terms: 0 + 7.75 = 7.75
0.1875x + x2 = 7.75

The x term is 0.1875x.  Take half its coefficient (0.09375).
Square it (0.0087890625) and add it to both sides.

Add '0.0087890625' to each side of the equation.
0.1875x + 0.0087890625 + x2 = 7.75 + 0.0087890625

Reorder the terms:
0.0087890625 + 0.1875x + x2 = 7.75 + 0.0087890625

Combine like terms: 7.75 + 0.0087890625 = 7.7587890625
0.0087890625 + 0.1875x + x2 = 7.7587890625

Factor a perfect square on the left side:
(x + 0.09375)(x + 0.09375) = 7.7587890625

Calculate the square root of the right side: 2.785460296

Break this problem into two subproblems by setting 
(x + 0.09375) equal to 2.785460296 and -2.785460296.

Subproblem 1

x + 0.09375 = 2.785460296 Simplifying x + 0.09375 = 2.785460296 Reorder the terms: 0.09375 + x = 2.785460296 Solving 0.09375 + x = 2.785460296 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.09375' to each side of the equation. 0.09375 + -0.09375 + x = 2.785460296 + -0.09375 Combine like terms: 0.09375 + -0.09375 = 0.00000 0.00000 + x = 2.785460296 + -0.09375 x = 2.785460296 + -0.09375 Combine like terms: 2.785460296 + -0.09375 = 2.691710296 x = 2.691710296 Simplifying x = 2.691710296

Subproblem 2

x + 0.09375 = -2.785460296 Simplifying x + 0.09375 = -2.785460296 Reorder the terms: 0.09375 + x = -2.785460296 Solving 0.09375 + x = -2.785460296 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.09375' to each side of the equation. 0.09375 + -0.09375 + x = -2.785460296 + -0.09375 Combine like terms: 0.09375 + -0.09375 = 0.00000 0.00000 + x = -2.785460296 + -0.09375 x = -2.785460296 + -0.09375 Combine like terms: -2.785460296 + -0.09375 = -2.879210296 x = -2.879210296 Simplifying x = -2.879210296

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.691710296, -2.879210296}

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