(x+2)(x+2)=28

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Solution for (x+2)(x+2)=28 equation:


Simplifying
(x + 2)(x + 2) = 28

Reorder the terms:
(2 + x)(x + 2) = 28

Reorder the terms:
(2 + x)(2 + x) = 28

Multiply (2 + x) * (2 + x)
(2(2 + x) + x(2 + x)) = 28
((2 * 2 + x * 2) + x(2 + x)) = 28
((4 + 2x) + x(2 + x)) = 28
(4 + 2x + (2 * x + x * x)) = 28
(4 + 2x + (2x + x2)) = 28

Combine like terms: 2x + 2x = 4x
(4 + 4x + x2) = 28

Solving
4 + 4x + x2 = 28

Solving for variable 'x'.

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

Combine like terms: 4 + -28 = -24
-24 + 4x + x2 = 28 + -28

Combine like terms: 28 + -28 = 0
-24 + 4x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '24' to each side of the equation.
-24 + 4x + 24 + x2 = 0 + 24

Reorder the terms:
-24 + 24 + 4x + x2 = 0 + 24

Combine like terms: -24 + 24 = 0
0 + 4x + x2 = 0 + 24
4x + x2 = 0 + 24

Combine like terms: 0 + 24 = 24
4x + x2 = 24

The x term is 4x.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4x + 4 + x2 = 24 + 4

Reorder the terms:
4 + 4x + x2 = 24 + 4

Combine like terms: 24 + 4 = 28
4 + 4x + x2 = 28

Factor a perfect square on the left side:
(x + 2)(x + 2) = 28

Calculate the square root of the right side: 5.291502622

Break this problem into two subproblems by setting 
(x + 2) equal to 5.291502622 and -5.291502622.

Subproblem 1

x + 2 = 5.291502622 Simplifying x + 2 = 5.291502622 Reorder the terms: 2 + x = 5.291502622 Solving 2 + x = 5.291502622 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 5.291502622 + -2 Combine like terms: 2 + -2 = 0 0 + x = 5.291502622 + -2 x = 5.291502622 + -2 Combine like terms: 5.291502622 + -2 = 3.291502622 x = 3.291502622 Simplifying x = 3.291502622

Subproblem 2

x + 2 = -5.291502622 Simplifying x + 2 = -5.291502622 Reorder the terms: 2 + x = -5.291502622 Solving 2 + x = -5.291502622 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -5.291502622 + -2 Combine like terms: 2 + -2 = 0 0 + x = -5.291502622 + -2 x = -5.291502622 + -2 Combine like terms: -5.291502622 + -2 = -7.291502622 x = -7.291502622 Simplifying x = -7.291502622

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.291502622, -7.291502622}

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