16x^2-13x-224=0

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Solution for 16x^2-13x-224=0 equation:


Simplifying
16x2 + -13x + -224 = 0

Reorder the terms:
-224 + -13x + 16x2 = 0

Solving
-224 + -13x + 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 + -0.8125x + x2 = 0

Move the constant term to the right:

Add '14' to each side of the equation.
-14 + -0.8125x + 14 + x2 = 0 + 14

Reorder the terms:
-14 + 14 + -0.8125x + x2 = 0 + 14

Combine like terms: -14 + 14 = 0
0 + -0.8125x + x2 = 0 + 14
-0.8125x + x2 = 0 + 14

Combine like terms: 0 + 14 = 14
-0.8125x + x2 = 14

The x term is -0.8125x.  Take half its coefficient (-0.40625).
Square it (0.1650390625) and add it to both sides.

Add '0.1650390625' to each side of the equation.
-0.8125x + 0.1650390625 + x2 = 14 + 0.1650390625

Reorder the terms:
0.1650390625 + -0.8125x + x2 = 14 + 0.1650390625

Combine like terms: 14 + 0.1650390625 = 14.1650390625
0.1650390625 + -0.8125x + x2 = 14.1650390625

Factor a perfect square on the left side:
(x + -0.40625)(x + -0.40625) = 14.1650390625

Calculate the square root of the right side: 3.763647043

Break this problem into two subproblems by setting 
(x + -0.40625) equal to 3.763647043 and -3.763647043.

Subproblem 1

x + -0.40625 = 3.763647043 Simplifying x + -0.40625 = 3.763647043 Reorder the terms: -0.40625 + x = 3.763647043 Solving -0.40625 + x = 3.763647043 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.40625' to each side of the equation. -0.40625 + 0.40625 + x = 3.763647043 + 0.40625 Combine like terms: -0.40625 + 0.40625 = 0.00000 0.00000 + x = 3.763647043 + 0.40625 x = 3.763647043 + 0.40625 Combine like terms: 3.763647043 + 0.40625 = 4.169897043 x = 4.169897043 Simplifying x = 4.169897043

Subproblem 2

x + -0.40625 = -3.763647043 Simplifying x + -0.40625 = -3.763647043 Reorder the terms: -0.40625 + x = -3.763647043 Solving -0.40625 + x = -3.763647043 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.40625' to each side of the equation. -0.40625 + 0.40625 + x = -3.763647043 + 0.40625 Combine like terms: -0.40625 + 0.40625 = 0.00000 0.00000 + x = -3.763647043 + 0.40625 x = -3.763647043 + 0.40625 Combine like terms: -3.763647043 + 0.40625 = -3.357397043 x = -3.357397043 Simplifying x = -3.357397043

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.169897043, -3.357397043}

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