0=-3x^2+30x-46

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Solution for 0=-3x^2+30x-46 equation:


Simplifying
0 = -3x2 + 30x + -46

Reorder the terms:
0 = -46 + 30x + -3x2

Solving
0 = -46 + 30x + -3x2

Solving for variable 'x'.

Combine like terms: 0 + 46 = 46
46 + -30x + 3x2 = -46 + 30x + -3x2 + 46 + -30x + 3x2

Reorder the terms:
46 + -30x + 3x2 = -46 + 46 + 30x + -30x + -3x2 + 3x2

Combine like terms: -46 + 46 = 0
46 + -30x + 3x2 = 0 + 30x + -30x + -3x2 + 3x2
46 + -30x + 3x2 = 30x + -30x + -3x2 + 3x2

Combine like terms: 30x + -30x = 0
46 + -30x + 3x2 = 0 + -3x2 + 3x2
46 + -30x + 3x2 = -3x2 + 3x2

Combine like terms: -3x2 + 3x2 = 0
46 + -30x + 3x2 = 0

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

Divide each side by '3'.
15.33333333 + -10x + x2 = 0

Move the constant term to the right:

Add '-15.33333333' to each side of the equation.
15.33333333 + -10x + -15.33333333 + x2 = 0 + -15.33333333

Reorder the terms:
15.33333333 + -15.33333333 + -10x + x2 = 0 + -15.33333333

Combine like terms: 15.33333333 + -15.33333333 = 0.00000000
0.00000000 + -10x + x2 = 0 + -15.33333333
-10x + x2 = 0 + -15.33333333

Combine like terms: 0 + -15.33333333 = -15.33333333
-10x + x2 = -15.33333333

The x term is -10x.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10x + 25 + x2 = -15.33333333 + 25

Reorder the terms:
25 + -10x + x2 = -15.33333333 + 25

Combine like terms: -15.33333333 + 25 = 9.66666667
25 + -10x + x2 = 9.66666667

Factor a perfect square on the left side:
(x + -5)(x + -5) = 9.66666667

Calculate the square root of the right side: 3.109126352

Break this problem into two subproblems by setting 
(x + -5) equal to 3.109126352 and -3.109126352.

Subproblem 1

x + -5 = 3.109126352 Simplifying x + -5 = 3.109126352 Reorder the terms: -5 + x = 3.109126352 Solving -5 + x = 3.109126352 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = 3.109126352 + 5 Combine like terms: -5 + 5 = 0 0 + x = 3.109126352 + 5 x = 3.109126352 + 5 Combine like terms: 3.109126352 + 5 = 8.109126352 x = 8.109126352 Simplifying x = 8.109126352

Subproblem 2

x + -5 = -3.109126352 Simplifying x + -5 = -3.109126352 Reorder the terms: -5 + x = -3.109126352 Solving -5 + x = -3.109126352 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = -3.109126352 + 5 Combine like terms: -5 + 5 = 0 0 + x = -3.109126352 + 5 x = -3.109126352 + 5 Combine like terms: -3.109126352 + 5 = 1.890873648 x = 1.890873648 Simplifying x = 1.890873648

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.109126352, 1.890873648}

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