100*x^2-29*x-125=0

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Solution for 100*x^2-29*x-125=0 equation:


Simplifying
100x2 + -29x + -125 = 0

Reorder the terms:
-125 + -29x + 100x2 = 0

Solving
-125 + -29x + 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'.
-1.25 + -0.29x + x2 = 0

Move the constant term to the right:

Add '1.25' to each side of the equation.
-1.25 + -0.29x + 1.25 + x2 = 0 + 1.25

Reorder the terms:
-1.25 + 1.25 + -0.29x + x2 = 0 + 1.25

Combine like terms: -1.25 + 1.25 = 0.00
0.00 + -0.29x + x2 = 0 + 1.25
-0.29x + x2 = 0 + 1.25

Combine like terms: 0 + 1.25 = 1.25
-0.29x + x2 = 1.25

The x term is -0.29x.  Take half its coefficient (-0.145).
Square it (0.021025) and add it to both sides.

Add '0.021025' to each side of the equation.
-0.29x + 0.021025 + x2 = 1.25 + 0.021025

Reorder the terms:
0.021025 + -0.29x + x2 = 1.25 + 0.021025

Combine like terms: 1.25 + 0.021025 = 1.271025
0.021025 + -0.29x + x2 = 1.271025

Factor a perfect square on the left side:
(x + -0.145)(x + -0.145) = 1.271025

Calculate the square root of the right side: 1.127397445

Break this problem into two subproblems by setting 
(x + -0.145) equal to 1.127397445 and -1.127397445.

Subproblem 1

x + -0.145 = 1.127397445 Simplifying x + -0.145 = 1.127397445 Reorder the terms: -0.145 + x = 1.127397445 Solving -0.145 + x = 1.127397445 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.145' to each side of the equation. -0.145 + 0.145 + x = 1.127397445 + 0.145 Combine like terms: -0.145 + 0.145 = 0.000 0.000 + x = 1.127397445 + 0.145 x = 1.127397445 + 0.145 Combine like terms: 1.127397445 + 0.145 = 1.272397445 x = 1.272397445 Simplifying x = 1.272397445

Subproblem 2

x + -0.145 = -1.127397445 Simplifying x + -0.145 = -1.127397445 Reorder the terms: -0.145 + x = -1.127397445 Solving -0.145 + x = -1.127397445 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.145' to each side of the equation. -0.145 + 0.145 + x = -1.127397445 + 0.145 Combine like terms: -0.145 + 0.145 = 0.000 0.000 + x = -1.127397445 + 0.145 x = -1.127397445 + 0.145 Combine like terms: -1.127397445 + 0.145 = -0.982397445 x = -0.982397445 Simplifying x = -0.982397445

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.272397445, -0.982397445}

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