9x^2-x-100=0

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Solution for 9x^2-x-100=0 equation:


Simplifying
9x2 + -1x + -100 = 0

Reorder the terms:
-100 + -1x + 9x2 = 0

Solving
-100 + -1x + 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'.
-11.11111111 + -0.1111111111x + x2 = 0

Move the constant term to the right:

Add '11.11111111' to each side of the equation.
-11.11111111 + -0.1111111111x + 11.11111111 + x2 = 0 + 11.11111111

Reorder the terms:
-11.11111111 + 11.11111111 + -0.1111111111x + x2 = 0 + 11.11111111

Combine like terms: -11.11111111 + 11.11111111 = 0.00000000
0.00000000 + -0.1111111111x + x2 = 0 + 11.11111111
-0.1111111111x + x2 = 0 + 11.11111111

Combine like terms: 0 + 11.11111111 = 11.11111111
-0.1111111111x + x2 = 11.11111111

The x term is -0.1111111111x.  Take half its coefficient (-0.05555555555).
Square it (0.003086419752) and add it to both sides.

Add '0.003086419752' to each side of the equation.
-0.1111111111x + 0.003086419752 + x2 = 11.11111111 + 0.003086419752

Reorder the terms:
0.003086419752 + -0.1111111111x + x2 = 11.11111111 + 0.003086419752

Combine like terms: 11.11111111 + 0.003086419752 = 11.114197529752
0.003086419752 + -0.1111111111x + x2 = 11.114197529752

Factor a perfect square on the left side:
(x + -0.05555555555)(x + -0.05555555555) = 11.114197529752

Calculate the square root of the right side: 3.333796264

Break this problem into two subproblems by setting 
(x + -0.05555555555) equal to 3.333796264 and -3.333796264.

Subproblem 1

x + -0.05555555555 = 3.333796264 Simplifying x + -0.05555555555 = 3.333796264 Reorder the terms: -0.05555555555 + x = 3.333796264 Solving -0.05555555555 + x = 3.333796264 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.05555555555' to each side of the equation. -0.05555555555 + 0.05555555555 + x = 3.333796264 + 0.05555555555 Combine like terms: -0.05555555555 + 0.05555555555 = 0.00000000000 0.00000000000 + x = 3.333796264 + 0.05555555555 x = 3.333796264 + 0.05555555555 Combine like terms: 3.333796264 + 0.05555555555 = 3.38935181955 x = 3.38935181955 Simplifying x = 3.38935181955

Subproblem 2

x + -0.05555555555 = -3.333796264 Simplifying x + -0.05555555555 = -3.333796264 Reorder the terms: -0.05555555555 + x = -3.333796264 Solving -0.05555555555 + x = -3.333796264 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.05555555555' to each side of the equation. -0.05555555555 + 0.05555555555 + x = -3.333796264 + 0.05555555555 Combine like terms: -0.05555555555 + 0.05555555555 = 0.00000000000 0.00000000000 + x = -3.333796264 + 0.05555555555 x = -3.333796264 + 0.05555555555 Combine like terms: -3.333796264 + 0.05555555555 = -3.27824070845 x = -3.27824070845 Simplifying x = -3.27824070845

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.38935181955, -3.27824070845}

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