2x^2-100x-5=0

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Solution for 2x^2-100x-5=0 equation:


Simplifying
2x2 + -100x + -5 = 0

Reorder the terms:
-5 + -100x + 2x2 = 0

Solving
-5 + -100x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
-2.5 + -50x + x2 = 0

Move the constant term to the right:

Add '2.5' to each side of the equation.
-2.5 + -50x + 2.5 + x2 = 0 + 2.5

Reorder the terms:
-2.5 + 2.5 + -50x + x2 = 0 + 2.5

Combine like terms: -2.5 + 2.5 = 0.0
0.0 + -50x + x2 = 0 + 2.5
-50x + x2 = 0 + 2.5

Combine like terms: 0 + 2.5 = 2.5
-50x + x2 = 2.5

The x term is -50x.  Take half its coefficient (-25).
Square it (625) and add it to both sides.

Add '625' to each side of the equation.
-50x + 625 + x2 = 2.5 + 625

Reorder the terms:
625 + -50x + x2 = 2.5 + 625

Combine like terms: 2.5 + 625 = 627.5
625 + -50x + x2 = 627.5

Factor a perfect square on the left side:
(x + -25)(x + -25) = 627.5

Calculate the square root of the right side: 25.0499501

Break this problem into two subproblems by setting 
(x + -25) equal to 25.0499501 and -25.0499501.

Subproblem 1

x + -25 = 25.0499501 Simplifying x + -25 = 25.0499501 Reorder the terms: -25 + x = 25.0499501 Solving -25 + x = 25.0499501 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '25' to each side of the equation. -25 + 25 + x = 25.0499501 + 25 Combine like terms: -25 + 25 = 0 0 + x = 25.0499501 + 25 x = 25.0499501 + 25 Combine like terms: 25.0499501 + 25 = 50.0499501 x = 50.0499501 Simplifying x = 50.0499501

Subproblem 2

x + -25 = -25.0499501 Simplifying x + -25 = -25.0499501 Reorder the terms: -25 + x = -25.0499501 Solving -25 + x = -25.0499501 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '25' to each side of the equation. -25 + 25 + x = -25.0499501 + 25 Combine like terms: -25 + 25 = 0 0 + x = -25.0499501 + 25 x = -25.0499501 + 25 Combine like terms: -25.0499501 + 25 = -0.0499501 x = -0.0499501 Simplifying x = -0.0499501

Solution

The solution to the problem is based on the solutions from the subproblems. x = {50.0499501, -0.0499501}

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