x+x(x+2)=675

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Solution for x+x(x+2)=675 equation:


Simplifying
x + x(x + 2) = 675

Reorder the terms:
x + x(2 + x) = 675
x + (2 * x + x * x) = 675
x + (2x + x2) = 675

Combine like terms: x + 2x = 3x
3x + x2 = 675

Solving
3x + x2 = 675

Solving for variable 'x'.

Reorder the terms:
-675 + 3x + x2 = 675 + -675

Combine like terms: 675 + -675 = 0
-675 + 3x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '675' to each side of the equation.
-675 + 3x + 675 + x2 = 0 + 675

Reorder the terms:
-675 + 675 + 3x + x2 = 0 + 675

Combine like terms: -675 + 675 = 0
0 + 3x + x2 = 0 + 675
3x + x2 = 0 + 675

Combine like terms: 0 + 675 = 675
3x + x2 = 675

The x term is 3x.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3x + 2.25 + x2 = 675 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 675 + 2.25

Combine like terms: 675 + 2.25 = 677.25
2.25 + 3x + x2 = 677.25

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 677.25

Calculate the square root of the right side: 26.024027359

Break this problem into two subproblems by setting 
(x + 1.5) equal to 26.024027359 and -26.024027359.

Subproblem 1

x + 1.5 = 26.024027359 Simplifying x + 1.5 = 26.024027359 Reorder the terms: 1.5 + x = 26.024027359 Solving 1.5 + x = 26.024027359 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = 26.024027359 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 26.024027359 + -1.5 x = 26.024027359 + -1.5 Combine like terms: 26.024027359 + -1.5 = 24.524027359 x = 24.524027359 Simplifying x = 24.524027359

Subproblem 2

x + 1.5 = -26.024027359 Simplifying x + 1.5 = -26.024027359 Reorder the terms: 1.5 + x = -26.024027359 Solving 1.5 + x = -26.024027359 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = -26.024027359 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -26.024027359 + -1.5 x = -26.024027359 + -1.5 Combine like terms: -26.024027359 + -1.5 = -27.524027359 x = -27.524027359 Simplifying x = -27.524027359

Solution

The solution to the problem is based on the solutions from the subproblems. x = {24.524027359, -27.524027359}

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