4x^2+4x+1=28

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Solution for 4x^2+4x+1=28 equation:


Simplifying
4x2 + 4x + 1 = 28

Reorder the terms:
1 + 4x + 4x2 = 28

Solving
1 + 4x + 4x2 = 28

Solving for variable 'x'.

Reorder the terms:
1 + -28 + 4x + 4x2 = 28 + -28

Combine like terms: 1 + -28 = -27
-27 + 4x + 4x2 = 28 + -28

Combine like terms: 28 + -28 = 0
-27 + 4x + 4x2 = 0

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

Divide each side by '4'.
-6.75 + x + x2 = 0

Move the constant term to the right:

Add '6.75' to each side of the equation.
-6.75 + x + 6.75 + x2 = 0 + 6.75

Reorder the terms:
-6.75 + 6.75 + x + x2 = 0 + 6.75

Combine like terms: -6.75 + 6.75 = 0.00
0.00 + x + x2 = 0 + 6.75
x + x2 = 0 + 6.75

Combine like terms: 0 + 6.75 = 6.75
x + x2 = 6.75

The x term is x.  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.
 + 0.25 + x2 = 6.75 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = 6.75 + 0.25

Combine like terms: 6.75 + 0.25 = 7
1.25 + x2 = 7

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 7

Calculate the square root of the right side: 2.645751311

Break this problem into two subproblems by setting 
(x + 0.5) equal to 2.645751311 and -2.645751311.

Subproblem 1

x + 0.5 = 2.645751311 Simplifying x + 0.5 = 2.645751311 Reorder the terms: 0.5 + x = 2.645751311 Solving 0.5 + x = 2.645751311 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 = 2.645751311 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 2.645751311 + -0.5 x = 2.645751311 + -0.5 Combine like terms: 2.645751311 + -0.5 = 2.145751311 x = 2.145751311 Simplifying x = 2.145751311

Subproblem 2

x + 0.5 = -2.645751311 Simplifying x + 0.5 = -2.645751311 Reorder the terms: 0.5 + x = -2.645751311 Solving 0.5 + x = -2.645751311 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 = -2.645751311 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -2.645751311 + -0.5 x = -2.645751311 + -0.5 Combine like terms: -2.645751311 + -0.5 = -3.145751311 x = -3.145751311 Simplifying x = -3.145751311

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.145751311, -3.145751311}

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