6x+3x^2=500

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Solution for 6x+3x^2=500 equation:


Simplifying
6x + 3x2 = 500

Solving
6x + 3x2 = 500

Solving for variable 'x'.

Reorder the terms:
-500 + 6x + 3x2 = 500 + -500

Combine like terms: 500 + -500 = 0
-500 + 6x + 3x2 = 0

Begin completing the square.  Divide all terms by
3 the coefficient of the squared term: 

Divide each side by '3'.
-166.6666667 + 2x + x2 = 0

Move the constant term to the right:

Add '166.6666667' to each side of the equation.
-166.6666667 + 2x + 166.6666667 + x2 = 0 + 166.6666667

Reorder the terms:
-166.6666667 + 166.6666667 + 2x + x2 = 0 + 166.6666667

Combine like terms: -166.6666667 + 166.6666667 = 0.0000000
0.0000000 + 2x + x2 = 0 + 166.6666667
2x + x2 = 0 + 166.6666667

Combine like terms: 0 + 166.6666667 = 166.6666667
2x + x2 = 166.6666667

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 166.6666667 + 1

Reorder the terms:
1 + 2x + x2 = 166.6666667 + 1

Combine like terms: 166.6666667 + 1 = 167.6666667
1 + 2x + x2 = 167.6666667

Factor a perfect square on the left side:
(x + 1)(x + 1) = 167.6666667

Calculate the square root of the right side: 12.948616401

Break this problem into two subproblems by setting 
(x + 1) equal to 12.948616401 and -12.948616401.

Subproblem 1

x + 1 = 12.948616401 Simplifying x + 1 = 12.948616401 Reorder the terms: 1 + x = 12.948616401 Solving 1 + x = 12.948616401 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 12.948616401 + -1 Combine like terms: 1 + -1 = 0 0 + x = 12.948616401 + -1 x = 12.948616401 + -1 Combine like terms: 12.948616401 + -1 = 11.948616401 x = 11.948616401 Simplifying x = 11.948616401

Subproblem 2

x + 1 = -12.948616401 Simplifying x + 1 = -12.948616401 Reorder the terms: 1 + x = -12.948616401 Solving 1 + x = -12.948616401 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -12.948616401 + -1 Combine like terms: 1 + -1 = 0 0 + x = -12.948616401 + -1 x = -12.948616401 + -1 Combine like terms: -12.948616401 + -1 = -13.948616401 x = -13.948616401 Simplifying x = -13.948616401

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.948616401, -13.948616401}

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