3x^2-24x+40=0

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Solution for 3x^2-24x+40=0 equation:


Simplifying
3x2 + -24x + 40 = 0

Reorder the terms:
40 + -24x + 3x2 = 0

Solving
40 + -24x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
13.33333333 + -8x + x2 = 0

Move the constant term to the right:

Add '-13.33333333' to each side of the equation.
13.33333333 + -8x + -13.33333333 + x2 = 0 + -13.33333333

Reorder the terms:
13.33333333 + -13.33333333 + -8x + x2 = 0 + -13.33333333

Combine like terms: 13.33333333 + -13.33333333 = 0.00000000
0.00000000 + -8x + x2 = 0 + -13.33333333
-8x + x2 = 0 + -13.33333333

Combine like terms: 0 + -13.33333333 = -13.33333333
-8x + x2 = -13.33333333

The x term is -8x.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x + 16 + x2 = -13.33333333 + 16

Reorder the terms:
16 + -8x + x2 = -13.33333333 + 16

Combine like terms: -13.33333333 + 16 = 2.66666667
16 + -8x + x2 = 2.66666667

Factor a perfect square on the left side:
(x + -4)(x + -4) = 2.66666667

Calculate the square root of the right side: 1.632993163

Break this problem into two subproblems by setting 
(x + -4) equal to 1.632993163 and -1.632993163.

Subproblem 1

x + -4 = 1.632993163 Simplifying x + -4 = 1.632993163 Reorder the terms: -4 + x = 1.632993163 Solving -4 + x = 1.632993163 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 1.632993163 + 4 Combine like terms: -4 + 4 = 0 0 + x = 1.632993163 + 4 x = 1.632993163 + 4 Combine like terms: 1.632993163 + 4 = 5.632993163 x = 5.632993163 Simplifying x = 5.632993163

Subproblem 2

x + -4 = -1.632993163 Simplifying x + -4 = -1.632993163 Reorder the terms: -4 + x = -1.632993163 Solving -4 + x = -1.632993163 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -1.632993163 + 4 Combine like terms: -4 + 4 = 0 0 + x = -1.632993163 + 4 x = -1.632993163 + 4 Combine like terms: -1.632993163 + 4 = 2.367006837 x = 2.367006837 Simplifying x = 2.367006837

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.632993163, 2.367006837}

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