9x^2+6x-19=0

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Solution for 9x^2+6x-19=0 equation:


Simplifying
9x2 + 6x + -19 = 0

Reorder the terms:
-19 + 6x + 9x2 = 0

Solving
-19 + 6x + 9x2 = 0

Solving for variable 'x'.

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

Divide each side by '9'.
-2.111111111 + 0.6666666667x + x2 = 0

Move the constant term to the right:

Add '2.111111111' to each side of the equation.
-2.111111111 + 0.6666666667x + 2.111111111 + x2 = 0 + 2.111111111

Reorder the terms:
-2.111111111 + 2.111111111 + 0.6666666667x + x2 = 0 + 2.111111111

Combine like terms: -2.111111111 + 2.111111111 = 0.000000000
0.000000000 + 0.6666666667x + x2 = 0 + 2.111111111
0.6666666667x + x2 = 0 + 2.111111111

Combine like terms: 0 + 2.111111111 = 2.111111111
0.6666666667x + x2 = 2.111111111

The x term is 0.6666666667x.  Take half its coefficient (0.3333333334).
Square it (0.1111111112) and add it to both sides.

Add '0.1111111112' to each side of the equation.
0.6666666667x + 0.1111111112 + x2 = 2.111111111 + 0.1111111112

Reorder the terms:
0.1111111112 + 0.6666666667x + x2 = 2.111111111 + 0.1111111112

Combine like terms: 2.111111111 + 0.1111111112 = 2.2222222222
0.1111111112 + 0.6666666667x + x2 = 2.2222222222

Factor a perfect square on the left side:
(x + 0.3333333334)(x + 0.3333333334) = 2.2222222222

Calculate the square root of the right side: 1.490711985

Break this problem into two subproblems by setting 
(x + 0.3333333334) equal to 1.490711985 and -1.490711985.

Subproblem 1

x + 0.3333333334 = 1.490711985 Simplifying x + 0.3333333334 = 1.490711985 Reorder the terms: 0.3333333334 + x = 1.490711985 Solving 0.3333333334 + x = 1.490711985 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3333333334' to each side of the equation. 0.3333333334 + -0.3333333334 + x = 1.490711985 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + x = 1.490711985 + -0.3333333334 x = 1.490711985 + -0.3333333334 Combine like terms: 1.490711985 + -0.3333333334 = 1.1573786516 x = 1.1573786516 Simplifying x = 1.1573786516

Subproblem 2

x + 0.3333333334 = -1.490711985 Simplifying x + 0.3333333334 = -1.490711985 Reorder the terms: 0.3333333334 + x = -1.490711985 Solving 0.3333333334 + x = -1.490711985 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3333333334' to each side of the equation. 0.3333333334 + -0.3333333334 + x = -1.490711985 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + x = -1.490711985 + -0.3333333334 x = -1.490711985 + -0.3333333334 Combine like terms: -1.490711985 + -0.3333333334 = -1.8240453184 x = -1.8240453184 Simplifying x = -1.8240453184

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.1573786516, -1.8240453184}

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