6x^2-22x+15=0

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Solution for 6x^2-22x+15=0 equation:


Simplifying
6x2 + -22x + 15 = 0

Reorder the terms:
15 + -22x + 6x2 = 0

Solving
15 + -22x + 6x2 = 0

Solving for variable 'x'.

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

Divide each side by '6'.
2.5 + -3.666666667x + x2 = 0

Move the constant term to the right:

Add '-2.5' to each side of the equation.
2.5 + -3.666666667x + -2.5 + x2 = 0 + -2.5

Reorder the terms:
2.5 + -2.5 + -3.666666667x + x2 = 0 + -2.5

Combine like terms: 2.5 + -2.5 = 0.0
0.0 + -3.666666667x + x2 = 0 + -2.5
-3.666666667x + x2 = 0 + -2.5

Combine like terms: 0 + -2.5 = -2.5
-3.666666667x + x2 = -2.5

The x term is -3.666666667x.  Take half its coefficient (-1.833333334).
Square it (3.361111114) and add it to both sides.

Add '3.361111114' to each side of the equation.
-3.666666667x + 3.361111114 + x2 = -2.5 + 3.361111114

Reorder the terms:
3.361111114 + -3.666666667x + x2 = -2.5 + 3.361111114

Combine like terms: -2.5 + 3.361111114 = 0.861111114
3.361111114 + -3.666666667x + x2 = 0.861111114

Factor a perfect square on the left side:
(x + -1.833333334)(x + -1.833333334) = 0.861111114

Calculate the square root of the right side: 0.927960729

Break this problem into two subproblems by setting 
(x + -1.833333334) equal to 0.927960729 and -0.927960729.

Subproblem 1

x + -1.833333334 = 0.927960729 Simplifying x + -1.833333334 = 0.927960729 Reorder the terms: -1.833333334 + x = 0.927960729 Solving -1.833333334 + x = 0.927960729 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.833333334' to each side of the equation. -1.833333334 + 1.833333334 + x = 0.927960729 + 1.833333334 Combine like terms: -1.833333334 + 1.833333334 = 0.000000000 0.000000000 + x = 0.927960729 + 1.833333334 x = 0.927960729 + 1.833333334 Combine like terms: 0.927960729 + 1.833333334 = 2.761294063 x = 2.761294063 Simplifying x = 2.761294063

Subproblem 2

x + -1.833333334 = -0.927960729 Simplifying x + -1.833333334 = -0.927960729 Reorder the terms: -1.833333334 + x = -0.927960729 Solving -1.833333334 + x = -0.927960729 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.833333334' to each side of the equation. -1.833333334 + 1.833333334 + x = -0.927960729 + 1.833333334 Combine like terms: -1.833333334 + 1.833333334 = 0.000000000 0.000000000 + x = -0.927960729 + 1.833333334 x = -0.927960729 + 1.833333334 Combine like terms: -0.927960729 + 1.833333334 = 0.905372605 x = 0.905372605 Simplifying x = 0.905372605

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.761294063, 0.905372605}

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