3x^2-26x+36=0

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Solution for 3x^2-26x+36=0 equation:


Simplifying
3x2 + -26x + 36 = 0

Reorder the terms:
36 + -26x + 3x2 = 0

Solving
36 + -26x + 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'.
12 + -8.666666667x + x2 = 0

Move the constant term to the right:

Add '-12' to each side of the equation.
12 + -8.666666667x + -12 + x2 = 0 + -12

Reorder the terms:
12 + -12 + -8.666666667x + x2 = 0 + -12

Combine like terms: 12 + -12 = 0
0 + -8.666666667x + x2 = 0 + -12
-8.666666667x + x2 = 0 + -12

Combine like terms: 0 + -12 = -12
-8.666666667x + x2 = -12

The x term is -8.666666667x.  Take half its coefficient (-4.333333334).
Square it (18.77777778) and add it to both sides.

Add '18.77777778' to each side of the equation.
-8.666666667x + 18.77777778 + x2 = -12 + 18.77777778

Reorder the terms:
18.77777778 + -8.666666667x + x2 = -12 + 18.77777778

Combine like terms: -12 + 18.77777778 = 6.77777778
18.77777778 + -8.666666667x + x2 = 6.77777778

Factor a perfect square on the left side:
(x + -4.333333334)(x + -4.333333334) = 6.77777778

Calculate the square root of the right side: 2.603416559

Break this problem into two subproblems by setting 
(x + -4.333333334) equal to 2.603416559 and -2.603416559.

Subproblem 1

x + -4.333333334 = 2.603416559 Simplifying x + -4.333333334 = 2.603416559 Reorder the terms: -4.333333334 + x = 2.603416559 Solving -4.333333334 + x = 2.603416559 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.333333334' to each side of the equation. -4.333333334 + 4.333333334 + x = 2.603416559 + 4.333333334 Combine like terms: -4.333333334 + 4.333333334 = 0.000000000 0.000000000 + x = 2.603416559 + 4.333333334 x = 2.603416559 + 4.333333334 Combine like terms: 2.603416559 + 4.333333334 = 6.936749893 x = 6.936749893 Simplifying x = 6.936749893

Subproblem 2

x + -4.333333334 = -2.603416559 Simplifying x + -4.333333334 = -2.603416559 Reorder the terms: -4.333333334 + x = -2.603416559 Solving -4.333333334 + x = -2.603416559 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.333333334' to each side of the equation. -4.333333334 + 4.333333334 + x = -2.603416559 + 4.333333334 Combine like terms: -4.333333334 + 4.333333334 = 0.000000000 0.000000000 + x = -2.603416559 + 4.333333334 x = -2.603416559 + 4.333333334 Combine like terms: -2.603416559 + 4.333333334 = 1.729916775 x = 1.729916775 Simplifying x = 1.729916775

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.936749893, 1.729916775}

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