x(x+4)=32.64

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Solution for x(x+4)=32.64 equation:


Simplifying
x(x + 4) = 32.64

Reorder the terms:
x(4 + x) = 32.64
(4 * x + x * x) = 32.64
(4x + x2) = 32.64

Solving
4x + x2 = 32.64

Solving for variable 'x'.

Reorder the terms:
-32.64 + 4x + x2 = 32.64 + -32.64

Combine like terms: 32.64 + -32.64 = 0.00
-32.64 + 4x + x2 = 0.00

Begin completing the square.

Move the constant term to the right:

Add '32.64' to each side of the equation.
-32.64 + 4x + 32.64 + x2 = 0.00 + 32.64

Reorder the terms:
-32.64 + 32.64 + 4x + x2 = 0.00 + 32.64

Combine like terms: -32.64 + 32.64 = 0.00
0.00 + 4x + x2 = 0.00 + 32.64
4x + x2 = 0.00 + 32.64

Combine like terms: 0.00 + 32.64 = 32.64
4x + x2 = 32.64

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 = 32.64 + 4

Reorder the terms:
4 + 4x + x2 = 32.64 + 4

Combine like terms: 32.64 + 4 = 36.64
4 + 4x + x2 = 36.64

Factor a perfect square on the left side:
(x + 2)(x + 2) = 36.64

Calculate the square root of the right side: 6.05309838

Break this problem into two subproblems by setting 
(x + 2) equal to 6.05309838 and -6.05309838.

Subproblem 1

x + 2 = 6.05309838 Simplifying x + 2 = 6.05309838 Reorder the terms: 2 + x = 6.05309838 Solving 2 + x = 6.05309838 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 = 6.05309838 + -2 Combine like terms: 2 + -2 = 0 0 + x = 6.05309838 + -2 x = 6.05309838 + -2 Combine like terms: 6.05309838 + -2 = 4.05309838 x = 4.05309838 Simplifying x = 4.05309838

Subproblem 2

x + 2 = -6.05309838 Simplifying x + 2 = -6.05309838 Reorder the terms: 2 + x = -6.05309838 Solving 2 + x = -6.05309838 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 = -6.05309838 + -2 Combine like terms: 2 + -2 = 0 0 + x = -6.05309838 + -2 x = -6.05309838 + -2 Combine like terms: -6.05309838 + -2 = -8.05309838 x = -8.05309838 Simplifying x = -8.05309838

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.05309838, -8.05309838}

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