100x^2-99x-99=0

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Solution for 100x^2-99x-99=0 equation:


Simplifying
100x2 + -99x + -99 = 0

Reorder the terms:
-99 + -99x + 100x2 = 0

Solving
-99 + -99x + 100x2 = 0

Solving for variable 'x'.

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

Divide each side by '100'.
-0.99 + -0.99x + x2 = 0

Move the constant term to the right:

Add '0.99' to each side of the equation.
-0.99 + -0.99x + 0.99 + x2 = 0 + 0.99

Reorder the terms:
-0.99 + 0.99 + -0.99x + x2 = 0 + 0.99

Combine like terms: -0.99 + 0.99 = 0.00
0.00 + -0.99x + x2 = 0 + 0.99
-0.99x + x2 = 0 + 0.99

Combine like terms: 0 + 0.99 = 0.99
-0.99x + x2 = 0.99

The x term is -0.99x.  Take half its coefficient (-0.495).
Square it (0.245025) and add it to both sides.

Add '0.245025' to each side of the equation.
-0.99x + 0.245025 + x2 = 0.99 + 0.245025

Reorder the terms:
0.245025 + -0.99x + x2 = 0.99 + 0.245025

Combine like terms: 0.99 + 0.245025 = 1.235025
0.245025 + -0.99x + x2 = 1.235025

Factor a perfect square on the left side:
(x + -0.495)(x + -0.495) = 1.235025

Calculate the square root of the right side: 1.111316787

Break this problem into two subproblems by setting 
(x + -0.495) equal to 1.111316787 and -1.111316787.

Subproblem 1

x + -0.495 = 1.111316787 Simplifying x + -0.495 = 1.111316787 Reorder the terms: -0.495 + x = 1.111316787 Solving -0.495 + x = 1.111316787 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.495' to each side of the equation. -0.495 + 0.495 + x = 1.111316787 + 0.495 Combine like terms: -0.495 + 0.495 = 0.000 0.000 + x = 1.111316787 + 0.495 x = 1.111316787 + 0.495 Combine like terms: 1.111316787 + 0.495 = 1.606316787 x = 1.606316787 Simplifying x = 1.606316787

Subproblem 2

x + -0.495 = -1.111316787 Simplifying x + -0.495 = -1.111316787 Reorder the terms: -0.495 + x = -1.111316787 Solving -0.495 + x = -1.111316787 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.495' to each side of the equation. -0.495 + 0.495 + x = -1.111316787 + 0.495 Combine like terms: -0.495 + 0.495 = 0.000 0.000 + x = -1.111316787 + 0.495 x = -1.111316787 + 0.495 Combine like terms: -1.111316787 + 0.495 = -0.616316787 x = -0.616316787 Simplifying x = -0.616316787

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.606316787, -0.616316787}

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