(16x^2-16x-9)=0

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Solution for (16x^2-16x-9)=0 equation:


Simplifying
(16x2 + -16x + -9) = 0

Reorder the terms:
(-9 + -16x + 16x2) = 0

Remove parenthesis around (-9 + -16x + 16x2)
-9 + -16x + 16x2 = 0

Solving
-9 + -16x + 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'.
-0.5625 + -1x + x2 = 0

Move the constant term to the right:

Add '0.5625' to each side of the equation.
-0.5625 + -1x + 0.5625 + x2 = 0 + 0.5625

Reorder the terms:
-0.5625 + 0.5625 + -1x + x2 = 0 + 0.5625

Combine like terms: -0.5625 + 0.5625 = 0.0000
0.0000 + -1x + x2 = 0 + 0.5625
-1x + x2 = 0 + 0.5625

Combine like terms: 0 + 0.5625 = 0.5625
-1x + x2 = 0.5625

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = 0.5625 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 0.5625 + 0.25

Combine like terms: 0.5625 + 0.25 = 0.8125
0.25 + -1x + x2 = 0.8125

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 0.8125

Calculate the square root of the right side: 0.901387819

Break this problem into two subproblems by setting 
(x + -0.5) equal to 0.901387819 and -0.901387819.

Subproblem 1

x + -0.5 = 0.901387819 Simplifying x + -0.5 = 0.901387819 Reorder the terms: -0.5 + x = 0.901387819 Solving -0.5 + x = 0.901387819 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 0.901387819 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 0.901387819 + 0.5 x = 0.901387819 + 0.5 Combine like terms: 0.901387819 + 0.5 = 1.401387819 x = 1.401387819 Simplifying x = 1.401387819

Subproblem 2

x + -0.5 = -0.901387819 Simplifying x + -0.5 = -0.901387819 Reorder the terms: -0.5 + x = -0.901387819 Solving -0.5 + x = -0.901387819 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -0.901387819 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -0.901387819 + 0.5 x = -0.901387819 + 0.5 Combine like terms: -0.901387819 + 0.5 = -0.401387819 x = -0.401387819 Simplifying x = -0.401387819

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.401387819, -0.401387819}

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