x(x+8)=96

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Solution for x(x+8)=96 equation:


Simplifying
x(x + 8) = 96

Reorder the terms:
x(8 + x) = 96
(8 * x + x * x) = 96
(8x + x2) = 96

Solving
8x + x2 = 96

Solving for variable 'x'.

Reorder the terms:
-96 + 8x + x2 = 96 + -96

Combine like terms: 96 + -96 = 0
-96 + 8x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '96' to each side of the equation.
-96 + 8x + 96 + x2 = 0 + 96

Reorder the terms:
-96 + 96 + 8x + x2 = 0 + 96

Combine like terms: -96 + 96 = 0
0 + 8x + x2 = 0 + 96
8x + x2 = 0 + 96

Combine like terms: 0 + 96 = 96
8x + x2 = 96

The x term is 8x.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8x + 16 + x2 = 96 + 16

Reorder the terms:
16 + 8x + x2 = 96 + 16

Combine like terms: 96 + 16 = 112
16 + 8x + x2 = 112

Factor a perfect square on the left side:
(x + 4)(x + 4) = 112

Calculate the square root of the right side: 10.583005244

Break this problem into two subproblems by setting 
(x + 4) equal to 10.583005244 and -10.583005244.

Subproblem 1

x + 4 = 10.583005244 Simplifying x + 4 = 10.583005244 Reorder the terms: 4 + x = 10.583005244 Solving 4 + x = 10.583005244 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = 10.583005244 + -4 Combine like terms: 4 + -4 = 0 0 + x = 10.583005244 + -4 x = 10.583005244 + -4 Combine like terms: 10.583005244 + -4 = 6.583005244 x = 6.583005244 Simplifying x = 6.583005244

Subproblem 2

x + 4 = -10.583005244 Simplifying x + 4 = -10.583005244 Reorder the terms: 4 + x = -10.583005244 Solving 4 + x = -10.583005244 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = -10.583005244 + -4 Combine like terms: 4 + -4 = 0 0 + x = -10.583005244 + -4 x = -10.583005244 + -4 Combine like terms: -10.583005244 + -4 = -14.583005244 x = -14.583005244 Simplifying x = -14.583005244

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.583005244, -14.583005244}

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