4x^2+1=16+8x

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Solution for 4x^2+1=16+8x equation:


Simplifying
4x2 + 1 = 16 + 8x

Reorder the terms:
1 + 4x2 = 16 + 8x

Solving
1 + 4x2 = 16 + 8x

Solving for variable 'x'.

Reorder the terms:
1 + -16 + -8x + 4x2 = 16 + 8x + -16 + -8x

Combine like terms: 1 + -16 = -15
-15 + -8x + 4x2 = 16 + 8x + -16 + -8x

Reorder the terms:
-15 + -8x + 4x2 = 16 + -16 + 8x + -8x

Combine like terms: 16 + -16 = 0
-15 + -8x + 4x2 = 0 + 8x + -8x
-15 + -8x + 4x2 = 8x + -8x

Combine like terms: 8x + -8x = 0
-15 + -8x + 4x2 = 0

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

Divide each side by '4'.
-3.75 + -2x + x2 = 0

Move the constant term to the right:

Add '3.75' to each side of the equation.
-3.75 + -2x + 3.75 + x2 = 0 + 3.75

Reorder the terms:
-3.75 + 3.75 + -2x + x2 = 0 + 3.75

Combine like terms: -3.75 + 3.75 = 0.00
0.00 + -2x + x2 = 0 + 3.75
-2x + x2 = 0 + 3.75

Combine like terms: 0 + 3.75 = 3.75
-2x + x2 = 3.75

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 = 3.75 + 1

Reorder the terms:
1 + -2x + x2 = 3.75 + 1

Combine like terms: 3.75 + 1 = 4.75
1 + -2x + x2 = 4.75

Factor a perfect square on the left side:
(x + -1)(x + -1) = 4.75

Calculate the square root of the right side: 2.179449472

Break this problem into two subproblems by setting 
(x + -1) equal to 2.179449472 and -2.179449472.

Subproblem 1

x + -1 = 2.179449472 Simplifying x + -1 = 2.179449472 Reorder the terms: -1 + x = 2.179449472 Solving -1 + x = 2.179449472 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 = 2.179449472 + 1 Combine like terms: -1 + 1 = 0 0 + x = 2.179449472 + 1 x = 2.179449472 + 1 Combine like terms: 2.179449472 + 1 = 3.179449472 x = 3.179449472 Simplifying x = 3.179449472

Subproblem 2

x + -1 = -2.179449472 Simplifying x + -1 = -2.179449472 Reorder the terms: -1 + x = -2.179449472 Solving -1 + x = -2.179449472 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 = -2.179449472 + 1 Combine like terms: -1 + 1 = 0 0 + x = -2.179449472 + 1 x = -2.179449472 + 1 Combine like terms: -2.179449472 + 1 = -1.179449472 x = -1.179449472 Simplifying x = -1.179449472

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.179449472, -1.179449472}

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