3x^2-19x+18=0

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Solution for 3x^2-19x+18=0 equation:


Simplifying
3x2 + -19x + 18 = 0

Reorder the terms:
18 + -19x + 3x2 = 0

Solving
18 + -19x + 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'.
6 + -6.333333333x + x2 = 0

Move the constant term to the right:

Add '-6' to each side of the equation.
6 + -6.333333333x + -6 + x2 = 0 + -6

Reorder the terms:
6 + -6 + -6.333333333x + x2 = 0 + -6

Combine like terms: 6 + -6 = 0
0 + -6.333333333x + x2 = 0 + -6
-6.333333333x + x2 = 0 + -6

Combine like terms: 0 + -6 = -6
-6.333333333x + x2 = -6

The x term is -6.333333333x.  Take half its coefficient (-3.166666667).
Square it (10.02777778) and add it to both sides.

Add '10.02777778' to each side of the equation.
-6.333333333x + 10.02777778 + x2 = -6 + 10.02777778

Reorder the terms:
10.02777778 + -6.333333333x + x2 = -6 + 10.02777778

Combine like terms: -6 + 10.02777778 = 4.02777778
10.02777778 + -6.333333333x + x2 = 4.02777778

Factor a perfect square on the left side:
(x + -3.166666667)(x + -3.166666667) = 4.02777778

Calculate the square root of the right side: 2.00693243

Break this problem into two subproblems by setting 
(x + -3.166666667) equal to 2.00693243 and -2.00693243.

Subproblem 1

x + -3.166666667 = 2.00693243 Simplifying x + -3.166666667 = 2.00693243 Reorder the terms: -3.166666667 + x = 2.00693243 Solving -3.166666667 + x = 2.00693243 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.166666667' to each side of the equation. -3.166666667 + 3.166666667 + x = 2.00693243 + 3.166666667 Combine like terms: -3.166666667 + 3.166666667 = 0.000000000 0.000000000 + x = 2.00693243 + 3.166666667 x = 2.00693243 + 3.166666667 Combine like terms: 2.00693243 + 3.166666667 = 5.173599097 x = 5.173599097 Simplifying x = 5.173599097

Subproblem 2

x + -3.166666667 = -2.00693243 Simplifying x + -3.166666667 = -2.00693243 Reorder the terms: -3.166666667 + x = -2.00693243 Solving -3.166666667 + x = -2.00693243 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.166666667' to each side of the equation. -3.166666667 + 3.166666667 + x = -2.00693243 + 3.166666667 Combine like terms: -3.166666667 + 3.166666667 = 0.000000000 0.000000000 + x = -2.00693243 + 3.166666667 x = -2.00693243 + 3.166666667 Combine like terms: -2.00693243 + 3.166666667 = 1.159734237 x = 1.159734237 Simplifying x = 1.159734237

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.173599097, 1.159734237}

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