9x^2-14x-10=0

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Solution for 9x^2-14x-10=0 equation:


Simplifying
9x2 + -14x + -10 = 0

Reorder the terms:
-10 + -14x + 9x2 = 0

Solving
-10 + -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'.
-1.111111111 + -1.555555556x + x2 = 0

Move the constant term to the right:

Add '1.111111111' to each side of the equation.
-1.111111111 + -1.555555556x + 1.111111111 + x2 = 0 + 1.111111111

Reorder the terms:
-1.111111111 + 1.111111111 + -1.555555556x + x2 = 0 + 1.111111111

Combine like terms: -1.111111111 + 1.111111111 = 0.000000000
0.000000000 + -1.555555556x + x2 = 0 + 1.111111111
-1.555555556x + x2 = 0 + 1.111111111

Combine like terms: 0 + 1.111111111 = 1.111111111
-1.555555556x + x2 = 1.111111111

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 = 1.111111111 + 0.6049382720

Reorder the terms:
0.6049382720 + -1.555555556x + x2 = 1.111111111 + 0.6049382720

Combine like terms: 1.111111111 + 0.6049382720 = 1.716049383
0.6049382720 + -1.555555556x + x2 = 1.716049383

Factor a perfect square on the left side:
(x + -0.777777778)(x + -0.777777778) = 1.716049383

Calculate the square root of the right side: 1.30998068

Break this problem into two subproblems by setting 
(x + -0.777777778) equal to 1.30998068 and -1.30998068.

Subproblem 1

x + -0.777777778 = 1.30998068 Simplifying x + -0.777777778 = 1.30998068 Reorder the terms: -0.777777778 + x = 1.30998068 Solving -0.777777778 + x = 1.30998068 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 = 1.30998068 + 0.777777778 Combine like terms: -0.777777778 + 0.777777778 = 0.000000000 0.000000000 + x = 1.30998068 + 0.777777778 x = 1.30998068 + 0.777777778 Combine like terms: 1.30998068 + 0.777777778 = 2.087758458 x = 2.087758458 Simplifying x = 2.087758458

Subproblem 2

x + -0.777777778 = -1.30998068 Simplifying x + -0.777777778 = -1.30998068 Reorder the terms: -0.777777778 + x = -1.30998068 Solving -0.777777778 + x = -1.30998068 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 = -1.30998068 + 0.777777778 Combine like terms: -0.777777778 + 0.777777778 = 0.000000000 0.000000000 + x = -1.30998068 + 0.777777778 x = -1.30998068 + 0.777777778 Combine like terms: -1.30998068 + 0.777777778 = -0.532202902 x = -0.532202902 Simplifying x = -0.532202902

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.087758458, -0.532202902}

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