16x^2-9=2x+6

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Solution for 16x^2-9=2x+6 equation:


Simplifying
16x2 + -9 = 2x + 6

Reorder the terms:
-9 + 16x2 = 2x + 6

Reorder the terms:
-9 + 16x2 = 6 + 2x

Solving
-9 + 16x2 = 6 + 2x

Solving for variable 'x'.

Reorder the terms:
-9 + -6 + -2x + 16x2 = 6 + 2x + -6 + -2x

Combine like terms: -9 + -6 = -15
-15 + -2x + 16x2 = 6 + 2x + -6 + -2x

Reorder the terms:
-15 + -2x + 16x2 = 6 + -6 + 2x + -2x

Combine like terms: 6 + -6 = 0
-15 + -2x + 16x2 = 0 + 2x + -2x
-15 + -2x + 16x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
-15 + -2x + 16x2 = 0

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

Divide each side by '16'.
-0.9375 + -0.125x + x2 = 0

Move the constant term to the right:

Add '0.9375' to each side of the equation.
-0.9375 + -0.125x + 0.9375 + x2 = 0 + 0.9375

Reorder the terms:
-0.9375 + 0.9375 + -0.125x + x2 = 0 + 0.9375

Combine like terms: -0.9375 + 0.9375 = 0.0000
0.0000 + -0.125x + x2 = 0 + 0.9375
-0.125x + x2 = 0 + 0.9375

Combine like terms: 0 + 0.9375 = 0.9375
-0.125x + x2 = 0.9375

The x term is -0.125x.  Take half its coefficient (-0.0625).
Square it (0.00390625) and add it to both sides.

Add '0.00390625' to each side of the equation.
-0.125x + 0.00390625 + x2 = 0.9375 + 0.00390625

Reorder the terms:
0.00390625 + -0.125x + x2 = 0.9375 + 0.00390625

Combine like terms: 0.9375 + 0.00390625 = 0.94140625
0.00390625 + -0.125x + x2 = 0.94140625

Factor a perfect square on the left side:
(x + -0.0625)(x + -0.0625) = 0.94140625

Calculate the square root of the right side: 0.970260919

Break this problem into two subproblems by setting 
(x + -0.0625) equal to 0.970260919 and -0.970260919.

Subproblem 1

x + -0.0625 = 0.970260919 Simplifying x + -0.0625 = 0.970260919 Reorder the terms: -0.0625 + x = 0.970260919 Solving -0.0625 + x = 0.970260919 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.0625' to each side of the equation. -0.0625 + 0.0625 + x = 0.970260919 + 0.0625 Combine like terms: -0.0625 + 0.0625 = 0.0000 0.0000 + x = 0.970260919 + 0.0625 x = 0.970260919 + 0.0625 Combine like terms: 0.970260919 + 0.0625 = 1.032760919 x = 1.032760919 Simplifying x = 1.032760919

Subproblem 2

x + -0.0625 = -0.970260919 Simplifying x + -0.0625 = -0.970260919 Reorder the terms: -0.0625 + x = -0.970260919 Solving -0.0625 + x = -0.970260919 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.0625' to each side of the equation. -0.0625 + 0.0625 + x = -0.970260919 + 0.0625 Combine like terms: -0.0625 + 0.0625 = 0.0000 0.0000 + x = -0.970260919 + 0.0625 x = -0.970260919 + 0.0625 Combine like terms: -0.970260919 + 0.0625 = -0.907760919 x = -0.907760919 Simplifying x = -0.907760919

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.032760919, -0.907760919}

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