9x^2+14x-5=0

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Solution for 9x^2+14x-5=0 equation:


Simplifying
9x2 + 14x + -5 = 0

Reorder the terms:
-5 + 14x + 9x2 = 0

Solving
-5 + 14x + 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'.
-0.5555555556 + 1.555555556x + x2 = 0

Move the constant term to the right:

Add '0.5555555556' to each side of the equation.
-0.5555555556 + 1.555555556x + 0.5555555556 + x2 = 0 + 0.5555555556

Reorder the terms:
-0.5555555556 + 0.5555555556 + 1.555555556x + x2 = 0 + 0.5555555556

Combine like terms: -0.5555555556 + 0.5555555556 = 0.0000000000
0.0000000000 + 1.555555556x + x2 = 0 + 0.5555555556
1.555555556x + x2 = 0 + 0.5555555556

Combine like terms: 0 + 0.5555555556 = 0.5555555556
1.555555556x + x2 = 0.5555555556

The x term is 1.555555556x.  Take half its coefficient (0.777777778).
Square it (0.6049382720) and add it to both sides.

Add '0.6049382720' to each side of the equation.
1.555555556x + 0.6049382720 + x2 = 0.5555555556 + 0.6049382720

Reorder the terms:
0.6049382720 + 1.555555556x + x2 = 0.5555555556 + 0.6049382720

Combine like terms: 0.5555555556 + 0.6049382720 = 1.1604938276
0.6049382720 + 1.555555556x + x2 = 1.1604938276

Factor a perfect square on the left side:
(x + 0.777777778)(x + 0.777777778) = 1.1604938276

Calculate the square root of the right side: 1.077262191

Break this problem into two subproblems by setting 
(x + 0.777777778) equal to 1.077262191 and -1.077262191.

Subproblem 1

x + 0.777777778 = 1.077262191 Simplifying x + 0.777777778 = 1.077262191 Reorder the terms: 0.777777778 + x = 1.077262191 Solving 0.777777778 + x = 1.077262191 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.777777778' to each side of the equation. 0.777777778 + -0.777777778 + x = 1.077262191 + -0.777777778 Combine like terms: 0.777777778 + -0.777777778 = 0.000000000 0.000000000 + x = 1.077262191 + -0.777777778 x = 1.077262191 + -0.777777778 Combine like terms: 1.077262191 + -0.777777778 = 0.299484413 x = 0.299484413 Simplifying x = 0.299484413

Subproblem 2

x + 0.777777778 = -1.077262191 Simplifying x + 0.777777778 = -1.077262191 Reorder the terms: 0.777777778 + x = -1.077262191 Solving 0.777777778 + x = -1.077262191 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.777777778' to each side of the equation. 0.777777778 + -0.777777778 + x = -1.077262191 + -0.777777778 Combine like terms: 0.777777778 + -0.777777778 = 0.000000000 0.000000000 + x = -1.077262191 + -0.777777778 x = -1.077262191 + -0.777777778 Combine like terms: -1.077262191 + -0.777777778 = -1.855039969 x = -1.855039969 Simplifying x = -1.855039969

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.299484413, -1.855039969}

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