3x^2-64x+252=0

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Solution for 3x^2-64x+252=0 equation:


Simplifying
3x2 + -64x + 252 = 0

Reorder the terms:
252 + -64x + 3x2 = 0

Solving
252 + -64x + 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'.
84 + -21.33333333x + x2 = 0

Move the constant term to the right:

Add '-84' to each side of the equation.
84 + -21.33333333x + -84 + x2 = 0 + -84

Reorder the terms:
84 + -84 + -21.33333333x + x2 = 0 + -84

Combine like terms: 84 + -84 = 0
0 + -21.33333333x + x2 = 0 + -84
-21.33333333x + x2 = 0 + -84

Combine like terms: 0 + -84 = -84
-21.33333333x + x2 = -84

The x term is -21.33333333x.  Take half its coefficient (-10.66666667).
Square it (113.7777778) and add it to both sides.

Add '113.7777778' to each side of the equation.
-21.33333333x + 113.7777778 + x2 = -84 + 113.7777778

Reorder the terms:
113.7777778 + -21.33333333x + x2 = -84 + 113.7777778

Combine like terms: -84 + 113.7777778 = 29.7777778
113.7777778 + -21.33333333x + x2 = 29.7777778

Factor a perfect square on the left side:
(x + -10.66666667)(x + -10.66666667) = 29.7777778

Calculate the square root of the right side: 5.45690185

Break this problem into two subproblems by setting 
(x + -10.66666667) equal to 5.45690185 and -5.45690185.

Subproblem 1

x + -10.66666667 = 5.45690185 Simplifying x + -10.66666667 = 5.45690185 Reorder the terms: -10.66666667 + x = 5.45690185 Solving -10.66666667 + x = 5.45690185 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10.66666667' to each side of the equation. -10.66666667 + 10.66666667 + x = 5.45690185 + 10.66666667 Combine like terms: -10.66666667 + 10.66666667 = 0.00000000 0.00000000 + x = 5.45690185 + 10.66666667 x = 5.45690185 + 10.66666667 Combine like terms: 5.45690185 + 10.66666667 = 16.12356852 x = 16.12356852 Simplifying x = 16.12356852

Subproblem 2

x + -10.66666667 = -5.45690185 Simplifying x + -10.66666667 = -5.45690185 Reorder the terms: -10.66666667 + x = -5.45690185 Solving -10.66666667 + x = -5.45690185 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10.66666667' to each side of the equation. -10.66666667 + 10.66666667 + x = -5.45690185 + 10.66666667 Combine like terms: -10.66666667 + 10.66666667 = 0.00000000 0.00000000 + x = -5.45690185 + 10.66666667 x = -5.45690185 + 10.66666667 Combine like terms: -5.45690185 + 10.66666667 = 5.20976482 x = 5.20976482 Simplifying x = 5.20976482

Solution

The solution to the problem is based on the solutions from the subproblems. x = {16.12356852, 5.20976482}

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