14x^2-19x-9=0

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Solution for 14x^2-19x-9=0 equation:


Simplifying
14x2 + -19x + -9 = 0

Reorder the terms:
-9 + -19x + 14x2 = 0

Solving
-9 + -19x + 14x2 = 0

Solving for variable 'x'.

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

Divide each side by '14'.
-0.6428571429 + -1.357142857x + x2 = 0

Move the constant term to the right:

Add '0.6428571429' to each side of the equation.
-0.6428571429 + -1.357142857x + 0.6428571429 + x2 = 0 + 0.6428571429

Reorder the terms:
-0.6428571429 + 0.6428571429 + -1.357142857x + x2 = 0 + 0.6428571429

Combine like terms: -0.6428571429 + 0.6428571429 = 0.0000000000
0.0000000000 + -1.357142857x + x2 = 0 + 0.6428571429
-1.357142857x + x2 = 0 + 0.6428571429

Combine like terms: 0 + 0.6428571429 = 0.6428571429
-1.357142857x + x2 = 0.6428571429

The x term is -1.357142857x.  Take half its coefficient (-0.6785714285).
Square it (0.4604591836) and add it to both sides.

Add '0.4604591836' to each side of the equation.
-1.357142857x + 0.4604591836 + x2 = 0.6428571429 + 0.4604591836

Reorder the terms:
0.4604591836 + -1.357142857x + x2 = 0.6428571429 + 0.4604591836

Combine like terms: 0.6428571429 + 0.4604591836 = 1.1033163265
0.4604591836 + -1.357142857x + x2 = 1.1033163265

Factor a perfect square on the left side:
(x + -0.6785714285)(x + -0.6785714285) = 1.1033163265

Calculate the square root of the right side: 1.050388655

Break this problem into two subproblems by setting 
(x + -0.6785714285) equal to 1.050388655 and -1.050388655.

Subproblem 1

x + -0.6785714285 = 1.050388655 Simplifying x + -0.6785714285 = 1.050388655 Reorder the terms: -0.6785714285 + x = 1.050388655 Solving -0.6785714285 + x = 1.050388655 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.6785714285' to each side of the equation. -0.6785714285 + 0.6785714285 + x = 1.050388655 + 0.6785714285 Combine like terms: -0.6785714285 + 0.6785714285 = 0.0000000000 0.0000000000 + x = 1.050388655 + 0.6785714285 x = 1.050388655 + 0.6785714285 Combine like terms: 1.050388655 + 0.6785714285 = 1.7289600835 x = 1.7289600835 Simplifying x = 1.7289600835

Subproblem 2

x + -0.6785714285 = -1.050388655 Simplifying x + -0.6785714285 = -1.050388655 Reorder the terms: -0.6785714285 + x = -1.050388655 Solving -0.6785714285 + x = -1.050388655 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.6785714285' to each side of the equation. -0.6785714285 + 0.6785714285 + x = -1.050388655 + 0.6785714285 Combine like terms: -0.6785714285 + 0.6785714285 = 0.0000000000 0.0000000000 + x = -1.050388655 + 0.6785714285 x = -1.050388655 + 0.6785714285 Combine like terms: -1.050388655 + 0.6785714285 = -0.3718172265 x = -0.3718172265 Simplifying x = -0.3718172265

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.7289600835, -0.3718172265}

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