x(x+8)+(x+16)=888

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Solution for x(x+8)+(x+16)=888 equation:


Simplifying
x(x + 8) + (x + 16) = 888

Reorder the terms:
x(8 + x) + (x + 16) = 888
(8 * x + x * x) + (x + 16) = 888
(8x + x2) + (x + 16) = 888

Reorder the terms:
8x + x2 + (16 + x) = 888

Remove parenthesis around (16 + x)
8x + x2 + 16 + x = 888

Reorder the terms:
16 + 8x + x + x2 = 888

Combine like terms: 8x + x = 9x
16 + 9x + x2 = 888

Solving
16 + 9x + x2 = 888

Solving for variable 'x'.

Reorder the terms:
16 + -888 + 9x + x2 = 888 + -888

Combine like terms: 16 + -888 = -872
-872 + 9x + x2 = 888 + -888

Combine like terms: 888 + -888 = 0
-872 + 9x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '872' to each side of the equation.
-872 + 9x + 872 + x2 = 0 + 872

Reorder the terms:
-872 + 872 + 9x + x2 = 0 + 872

Combine like terms: -872 + 872 = 0
0 + 9x + x2 = 0 + 872
9x + x2 = 0 + 872

Combine like terms: 0 + 872 = 872
9x + x2 = 872

The x term is 9x.  Take half its coefficient (4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
9x + 20.25 + x2 = 872 + 20.25

Reorder the terms:
20.25 + 9x + x2 = 872 + 20.25

Combine like terms: 872 + 20.25 = 892.25
20.25 + 9x + x2 = 892.25

Factor a perfect square on the left side:
(x + 4.5)(x + 4.5) = 892.25

Calculate the square root of the right side: 29.870554062

Break this problem into two subproblems by setting 
(x + 4.5) equal to 29.870554062 and -29.870554062.

Subproblem 1

x + 4.5 = 29.870554062 Simplifying x + 4.5 = 29.870554062 Reorder the terms: 4.5 + x = 29.870554062 Solving 4.5 + x = 29.870554062 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + x = 29.870554062 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = 29.870554062 + -4.5 x = 29.870554062 + -4.5 Combine like terms: 29.870554062 + -4.5 = 25.370554062 x = 25.370554062 Simplifying x = 25.370554062

Subproblem 2

x + 4.5 = -29.870554062 Simplifying x + 4.5 = -29.870554062 Reorder the terms: 4.5 + x = -29.870554062 Solving 4.5 + x = -29.870554062 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + x = -29.870554062 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = -29.870554062 + -4.5 x = -29.870554062 + -4.5 Combine like terms: -29.870554062 + -4.5 = -34.370554062 x = -34.370554062 Simplifying x = -34.370554062

Solution

The solution to the problem is based on the solutions from the subproblems. x = {25.370554062, -34.370554062}

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