x+x(x+3*2)=675

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Solution for x+x(x+3*2)=675 equation:


Simplifying
x + x(x + 3 * 2) = 675

Multiply 3 * 2
x + x(x + 6) = 675

Reorder the terms:
x + x(6 + x) = 675
x + (6 * x + x * x) = 675
x + (6x + x2) = 675

Combine like terms: x + 6x = 7x
7x + x2 = 675

Solving
7x + x2 = 675

Solving for variable 'x'.

Reorder the terms:
-675 + 7x + x2 = 675 + -675

Combine like terms: 675 + -675 = 0
-675 + 7x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '675' to each side of the equation.
-675 + 7x + 675 + x2 = 0 + 675

Reorder the terms:
-675 + 675 + 7x + x2 = 0 + 675

Combine like terms: -675 + 675 = 0
0 + 7x + x2 = 0 + 675
7x + x2 = 0 + 675

Combine like terms: 0 + 675 = 675
7x + x2 = 675

The x term is 7x.  Take half its coefficient (3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
7x + 12.25 + x2 = 675 + 12.25

Reorder the terms:
12.25 + 7x + x2 = 675 + 12.25

Combine like terms: 675 + 12.25 = 687.25
12.25 + 7x + x2 = 687.25

Factor a perfect square on the left side:
(x + 3.5)(x + 3.5) = 687.25

Calculate the square root of the right side: 26.215453458

Break this problem into two subproblems by setting 
(x + 3.5) equal to 26.215453458 and -26.215453458.

Subproblem 1

x + 3.5 = 26.215453458 Simplifying x + 3.5 = 26.215453458 Reorder the terms: 3.5 + x = 26.215453458 Solving 3.5 + x = 26.215453458 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = 26.215453458 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = 26.215453458 + -3.5 x = 26.215453458 + -3.5 Combine like terms: 26.215453458 + -3.5 = 22.715453458 x = 22.715453458 Simplifying x = 22.715453458

Subproblem 2

x + 3.5 = -26.215453458 Simplifying x + 3.5 = -26.215453458 Reorder the terms: 3.5 + x = -26.215453458 Solving 3.5 + x = -26.215453458 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = -26.215453458 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = -26.215453458 + -3.5 x = -26.215453458 + -3.5 Combine like terms: -26.215453458 + -3.5 = -29.715453458 x = -29.715453458 Simplifying x = -29.715453458

Solution

The solution to the problem is based on the solutions from the subproblems. x = {22.715453458, -29.715453458}

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