3x^2=180+11x

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Solution for 3x^2=180+11x equation:


Simplifying
3x2 = 180 + 11x

Solving
3x2 = 180 + 11x

Solving for variable 'x'.

Reorder the terms:
-180 + -11x + 3x2 = 180 + 11x + -180 + -11x

Reorder the terms:
-180 + -11x + 3x2 = 180 + -180 + 11x + -11x

Combine like terms: 180 + -180 = 0
-180 + -11x + 3x2 = 0 + 11x + -11x
-180 + -11x + 3x2 = 11x + -11x

Combine like terms: 11x + -11x = 0
-180 + -11x + 3x2 = 0

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

Divide each side by '3'.
-60 + -3.666666667x + x2 = 0

Move the constant term to the right:

Add '60' to each side of the equation.
-60 + -3.666666667x + 60 + x2 = 0 + 60

Reorder the terms:
-60 + 60 + -3.666666667x + x2 = 0 + 60

Combine like terms: -60 + 60 = 0
0 + -3.666666667x + x2 = 0 + 60
-3.666666667x + x2 = 0 + 60

Combine like terms: 0 + 60 = 60
-3.666666667x + x2 = 60

The x term is -3.666666667x.  Take half its coefficient (-1.833333334).
Square it (3.361111114) and add it to both sides.

Add '3.361111114' to each side of the equation.
-3.666666667x + 3.361111114 + x2 = 60 + 3.361111114

Reorder the terms:
3.361111114 + -3.666666667x + x2 = 60 + 3.361111114

Combine like terms: 60 + 3.361111114 = 63.361111114
3.361111114 + -3.666666667x + x2 = 63.361111114

Factor a perfect square on the left side:
(x + -1.833333334)(x + -1.833333334) = 63.361111114

Calculate the square root of the right side: 7.959969291

Break this problem into two subproblems by setting 
(x + -1.833333334) equal to 7.959969291 and -7.959969291.

Subproblem 1

x + -1.833333334 = 7.959969291 Simplifying x + -1.833333334 = 7.959969291 Reorder the terms: -1.833333334 + x = 7.959969291 Solving -1.833333334 + x = 7.959969291 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.833333334' to each side of the equation. -1.833333334 + 1.833333334 + x = 7.959969291 + 1.833333334 Combine like terms: -1.833333334 + 1.833333334 = 0.000000000 0.000000000 + x = 7.959969291 + 1.833333334 x = 7.959969291 + 1.833333334 Combine like terms: 7.959969291 + 1.833333334 = 9.793302625 x = 9.793302625 Simplifying x = 9.793302625

Subproblem 2

x + -1.833333334 = -7.959969291 Simplifying x + -1.833333334 = -7.959969291 Reorder the terms: -1.833333334 + x = -7.959969291 Solving -1.833333334 + x = -7.959969291 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.833333334' to each side of the equation. -1.833333334 + 1.833333334 + x = -7.959969291 + 1.833333334 Combine like terms: -1.833333334 + 1.833333334 = 0.000000000 0.000000000 + x = -7.959969291 + 1.833333334 x = -7.959969291 + 1.833333334 Combine like terms: -7.959969291 + 1.833333334 = -6.126635957 x = -6.126635957 Simplifying x = -6.126635957

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.793302625, -6.126635957}

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