x+x+x+x+x+x+(x*x)=20

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Solution for x+x+x+x+x+x+(x*x)=20 equation:


Simplifying
x + x + x + x + x + x + (x * x) = 20

Multiply x * x
x + x + x + x + x + x + (x2) = 20
x + x + x + x + x + x + x2 = 20

Combine like terms: x + x = 2x
2x + x + x + x + x + x2 = 20

Combine like terms: 2x + x = 3x
3x + x + x + x + x2 = 20

Combine like terms: 3x + x = 4x
4x + x + x + x2 = 20

Combine like terms: 4x + x = 5x
5x + x + x2 = 20

Combine like terms: 5x + x = 6x
6x + x2 = 20

Solving
6x + x2 = 20

Solving for variable 'x'.

Reorder the terms:
-20 + 6x + x2 = 20 + -20

Combine like terms: 20 + -20 = 0
-20 + 6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '20' to each side of the equation.
-20 + 6x + 20 + x2 = 0 + 20

Reorder the terms:
-20 + 20 + 6x + x2 = 0 + 20

Combine like terms: -20 + 20 = 0
0 + 6x + x2 = 0 + 20
6x + x2 = 0 + 20

Combine like terms: 0 + 20 = 20
6x + x2 = 20

The x term is 6x.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6x + 9 + x2 = 20 + 9

Reorder the terms:
9 + 6x + x2 = 20 + 9

Combine like terms: 20 + 9 = 29
9 + 6x + x2 = 29

Factor a perfect square on the left side:
(x + 3)(x + 3) = 29

Calculate the square root of the right side: 5.385164807

Break this problem into two subproblems by setting 
(x + 3) equal to 5.385164807 and -5.385164807.

Subproblem 1

x + 3 = 5.385164807 Simplifying x + 3 = 5.385164807 Reorder the terms: 3 + x = 5.385164807 Solving 3 + x = 5.385164807 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 5.385164807 + -3 Combine like terms: 3 + -3 = 0 0 + x = 5.385164807 + -3 x = 5.385164807 + -3 Combine like terms: 5.385164807 + -3 = 2.385164807 x = 2.385164807 Simplifying x = 2.385164807

Subproblem 2

x + 3 = -5.385164807 Simplifying x + 3 = -5.385164807 Reorder the terms: 3 + x = -5.385164807 Solving 3 + x = -5.385164807 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = -5.385164807 + -3 Combine like terms: 3 + -3 = 0 0 + x = -5.385164807 + -3 x = -5.385164807 + -3 Combine like terms: -5.385164807 + -3 = -8.385164807 x = -8.385164807 Simplifying x = -8.385164807

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.385164807, -8.385164807}

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