16x^2+32x+6=81

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Solution for 16x^2+32x+6=81 equation:


Simplifying
16x2 + 32x + 6 = 81

Reorder the terms:
6 + 32x + 16x2 = 81

Solving
6 + 32x + 16x2 = 81

Solving for variable 'x'.

Reorder the terms:
6 + -81 + 32x + 16x2 = 81 + -81

Combine like terms: 6 + -81 = -75
-75 + 32x + 16x2 = 81 + -81

Combine like terms: 81 + -81 = 0
-75 + 32x + 16x2 = 0

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

Divide each side by '16'.
-4.6875 + 2x + x2 = 0

Move the constant term to the right:

Add '4.6875' to each side of the equation.
-4.6875 + 2x + 4.6875 + x2 = 0 + 4.6875

Reorder the terms:
-4.6875 + 4.6875 + 2x + x2 = 0 + 4.6875

Combine like terms: -4.6875 + 4.6875 = 0.0000
0.0000 + 2x + x2 = 0 + 4.6875
2x + x2 = 0 + 4.6875

Combine like terms: 0 + 4.6875 = 4.6875
2x + x2 = 4.6875

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 4.6875 + 1

Reorder the terms:
1 + 2x + x2 = 4.6875 + 1

Combine like terms: 4.6875 + 1 = 5.6875
1 + 2x + x2 = 5.6875

Factor a perfect square on the left side:
(x + 1)(x + 1) = 5.6875

Calculate the square root of the right side: 2.384848004

Break this problem into two subproblems by setting 
(x + 1) equal to 2.384848004 and -2.384848004.

Subproblem 1

x + 1 = 2.384848004 Simplifying x + 1 = 2.384848004 Reorder the terms: 1 + x = 2.384848004 Solving 1 + x = 2.384848004 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 2.384848004 + -1 Combine like terms: 1 + -1 = 0 0 + x = 2.384848004 + -1 x = 2.384848004 + -1 Combine like terms: 2.384848004 + -1 = 1.384848004 x = 1.384848004 Simplifying x = 1.384848004

Subproblem 2

x + 1 = -2.384848004 Simplifying x + 1 = -2.384848004 Reorder the terms: 1 + x = -2.384848004 Solving 1 + x = -2.384848004 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -2.384848004 + -1 Combine like terms: 1 + -1 = 0 0 + x = -2.384848004 + -1 x = -2.384848004 + -1 Combine like terms: -2.384848004 + -1 = -3.384848004 x = -3.384848004 Simplifying x = -3.384848004

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.384848004, -3.384848004}

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