0=16x^2-5x-14

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Solution for 0=16x^2-5x-14 equation:


Simplifying
0 = 16x2 + -5x + -14

Reorder the terms:
0 = -14 + -5x + 16x2

Solving
0 = -14 + -5x + 16x2

Solving for variable 'x'.

Combine like terms: 0 + 14 = 14
14 + 5x + -16x2 = -14 + -5x + 16x2 + 14 + 5x + -16x2

Reorder the terms:
14 + 5x + -16x2 = -14 + 14 + -5x + 5x + 16x2 + -16x2

Combine like terms: -14 + 14 = 0
14 + 5x + -16x2 = 0 + -5x + 5x + 16x2 + -16x2
14 + 5x + -16x2 = -5x + 5x + 16x2 + -16x2

Combine like terms: -5x + 5x = 0
14 + 5x + -16x2 = 0 + 16x2 + -16x2
14 + 5x + -16x2 = 16x2 + -16x2

Combine like terms: 16x2 + -16x2 = 0
14 + 5x + -16x2 = 0

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

Divide each side by '-16'.
-0.875 + -0.3125x + x2 = 0

Move the constant term to the right:

Add '0.875' to each side of the equation.
-0.875 + -0.3125x + 0.875 + x2 = 0 + 0.875

Reorder the terms:
-0.875 + 0.875 + -0.3125x + x2 = 0 + 0.875

Combine like terms: -0.875 + 0.875 = 0.000
0.000 + -0.3125x + x2 = 0 + 0.875
-0.3125x + x2 = 0 + 0.875

Combine like terms: 0 + 0.875 = 0.875
-0.3125x + x2 = 0.875

The x term is -0.3125x.  Take half its coefficient (-0.15625).
Square it (0.0244140625) and add it to both sides.

Add '0.0244140625' to each side of the equation.
-0.3125x + 0.0244140625 + x2 = 0.875 + 0.0244140625

Reorder the terms:
0.0244140625 + -0.3125x + x2 = 0.875 + 0.0244140625

Combine like terms: 0.875 + 0.0244140625 = 0.8994140625
0.0244140625 + -0.3125x + x2 = 0.8994140625

Factor a perfect square on the left side:
(x + -0.15625)(x + -0.15625) = 0.8994140625

Calculate the square root of the right side: 0.948374432

Break this problem into two subproblems by setting 
(x + -0.15625) equal to 0.948374432 and -0.948374432.

Subproblem 1

x + -0.15625 = 0.948374432 Simplifying x + -0.15625 = 0.948374432 Reorder the terms: -0.15625 + x = 0.948374432 Solving -0.15625 + x = 0.948374432 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.15625' to each side of the equation. -0.15625 + 0.15625 + x = 0.948374432 + 0.15625 Combine like terms: -0.15625 + 0.15625 = 0.00000 0.00000 + x = 0.948374432 + 0.15625 x = 0.948374432 + 0.15625 Combine like terms: 0.948374432 + 0.15625 = 1.104624432 x = 1.104624432 Simplifying x = 1.104624432

Subproblem 2

x + -0.15625 = -0.948374432 Simplifying x + -0.15625 = -0.948374432 Reorder the terms: -0.15625 + x = -0.948374432 Solving -0.15625 + x = -0.948374432 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.15625' to each side of the equation. -0.15625 + 0.15625 + x = -0.948374432 + 0.15625 Combine like terms: -0.15625 + 0.15625 = 0.00000 0.00000 + x = -0.948374432 + 0.15625 x = -0.948374432 + 0.15625 Combine like terms: -0.948374432 + 0.15625 = -0.792124432 x = -0.792124432 Simplifying x = -0.792124432

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.104624432, -0.792124432}

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