(x+2)(x+2)=-16x

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Solution for (x+2)(x+2)=-16x equation:


Simplifying
(x + 2)(x + 2) = -16x

Reorder the terms:
(2 + x)(x + 2) = -16x

Reorder the terms:
(2 + x)(2 + x) = -16x

Multiply (2 + x) * (2 + x)
(2(2 + x) + x(2 + x)) = -16x
((2 * 2 + x * 2) + x(2 + x)) = -16x
((4 + 2x) + x(2 + x)) = -16x
(4 + 2x + (2 * x + x * x)) = -16x
(4 + 2x + (2x + x2)) = -16x

Combine like terms: 2x + 2x = 4x
(4 + 4x + x2) = -16x

Solving
4 + 4x + x2 = -16x

Solving for variable 'x'.

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

Combine like terms: 4x + 16x = 20x
4 + 20x + x2 = -16x + 16x

Combine like terms: -16x + 16x = 0
4 + 20x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-4' to each side of the equation.
4 + 20x + -4 + x2 = 0 + -4

Reorder the terms:
4 + -4 + 20x + x2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + 20x + x2 = 0 + -4
20x + x2 = 0 + -4

Combine like terms: 0 + -4 = -4
20x + x2 = -4

The x term is 20x.  Take half its coefficient (10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
20x + 100 + x2 = -4 + 100

Reorder the terms:
100 + 20x + x2 = -4 + 100

Combine like terms: -4 + 100 = 96
100 + 20x + x2 = 96

Factor a perfect square on the left side:
(x + 10)(x + 10) = 96

Calculate the square root of the right side: 9.797958971

Break this problem into two subproblems by setting 
(x + 10) equal to 9.797958971 and -9.797958971.

Subproblem 1

x + 10 = 9.797958971 Simplifying x + 10 = 9.797958971 Reorder the terms: 10 + x = 9.797958971 Solving 10 + x = 9.797958971 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = 9.797958971 + -10 Combine like terms: 10 + -10 = 0 0 + x = 9.797958971 + -10 x = 9.797958971 + -10 Combine like terms: 9.797958971 + -10 = -0.202041029 x = -0.202041029 Simplifying x = -0.202041029

Subproblem 2

x + 10 = -9.797958971 Simplifying x + 10 = -9.797958971 Reorder the terms: 10 + x = -9.797958971 Solving 10 + x = -9.797958971 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = -9.797958971 + -10 Combine like terms: 10 + -10 = 0 0 + x = -9.797958971 + -10 x = -9.797958971 + -10 Combine like terms: -9.797958971 + -10 = -19.797958971 x = -19.797958971 Simplifying x = -19.797958971

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.202041029, -19.797958971}

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