0=3x^2-26x+30

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Solution for 0=3x^2-26x+30 equation:


Simplifying
0 = 3x2 + -26x + 30

Reorder the terms:
0 = 30 + -26x + 3x2

Solving
0 = 30 + -26x + 3x2

Solving for variable 'x'.

Combine like terms: 0 + -30 = -30
-30 + 26x + -3x2 = 30 + -26x + 3x2 + -30 + 26x + -3x2

Reorder the terms:
-30 + 26x + -3x2 = 30 + -30 + -26x + 26x + 3x2 + -3x2

Combine like terms: 30 + -30 = 0
-30 + 26x + -3x2 = 0 + -26x + 26x + 3x2 + -3x2
-30 + 26x + -3x2 = -26x + 26x + 3x2 + -3x2

Combine like terms: -26x + 26x = 0
-30 + 26x + -3x2 = 0 + 3x2 + -3x2
-30 + 26x + -3x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
-30 + 26x + -3x2 = 0

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

Divide each side by '-3'.
10 + -8.666666667x + x2 = 0

Move the constant term to the right:

Add '-10' to each side of the equation.
10 + -8.666666667x + -10 + x2 = 0 + -10

Reorder the terms:
10 + -10 + -8.666666667x + x2 = 0 + -10

Combine like terms: 10 + -10 = 0
0 + -8.666666667x + x2 = 0 + -10
-8.666666667x + x2 = 0 + -10

Combine like terms: 0 + -10 = -10
-8.666666667x + x2 = -10

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 = -10 + 18.77777778

Reorder the terms:
18.77777778 + -8.666666667x + x2 = -10 + 18.77777778

Combine like terms: -10 + 18.77777778 = 8.77777778
18.77777778 + -8.666666667x + x2 = 8.77777778

Factor a perfect square on the left side:
(x + -4.333333334)(x + -4.333333334) = 8.77777778

Calculate the square root of the right side: 2.962731473

Break this problem into two subproblems by setting 
(x + -4.333333334) equal to 2.962731473 and -2.962731473.

Subproblem 1

x + -4.333333334 = 2.962731473 Simplifying x + -4.333333334 = 2.962731473 Reorder the terms: -4.333333334 + x = 2.962731473 Solving -4.333333334 + x = 2.962731473 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 = 2.962731473 + 4.333333334 Combine like terms: -4.333333334 + 4.333333334 = 0.000000000 0.000000000 + x = 2.962731473 + 4.333333334 x = 2.962731473 + 4.333333334 Combine like terms: 2.962731473 + 4.333333334 = 7.296064807 x = 7.296064807 Simplifying x = 7.296064807

Subproblem 2

x + -4.333333334 = -2.962731473 Simplifying x + -4.333333334 = -2.962731473 Reorder the terms: -4.333333334 + x = -2.962731473 Solving -4.333333334 + x = -2.962731473 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 = -2.962731473 + 4.333333334 Combine like terms: -4.333333334 + 4.333333334 = 0.000000000 0.000000000 + x = -2.962731473 + 4.333333334 x = -2.962731473 + 4.333333334 Combine like terms: -2.962731473 + 4.333333334 = 1.370601861 x = 1.370601861 Simplifying x = 1.370601861

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.296064807, 1.370601861}

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