-x^2-100x+717=0

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Solution for -x^2-100x+717=0 equation:


Simplifying
-1x2 + -100x + 717 = 0

Reorder the terms:
717 + -100x + -1x2 = 0

Solving
717 + -100x + -1x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-717 + 100x + x2 = 0

Move the constant term to the right:

Add '717' to each side of the equation.
-717 + 100x + 717 + x2 = 0 + 717

Reorder the terms:
-717 + 717 + 100x + x2 = 0 + 717

Combine like terms: -717 + 717 = 0
0 + 100x + x2 = 0 + 717
100x + x2 = 0 + 717

Combine like terms: 0 + 717 = 717
100x + x2 = 717

The x term is 100x.  Take half its coefficient (50).
Square it (2500) and add it to both sides.

Add '2500' to each side of the equation.
100x + 2500 + x2 = 717 + 2500

Reorder the terms:
2500 + 100x + x2 = 717 + 2500

Combine like terms: 717 + 2500 = 3217
2500 + 100x + x2 = 3217

Factor a perfect square on the left side:
(x + 50)(x + 50) = 3217

Calculate the square root of the right side: 56.71860365

Break this problem into two subproblems by setting 
(x + 50) equal to 56.71860365 and -56.71860365.

Subproblem 1

x + 50 = 56.71860365 Simplifying x + 50 = 56.71860365 Reorder the terms: 50 + x = 56.71860365 Solving 50 + x = 56.71860365 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-50' to each side of the equation. 50 + -50 + x = 56.71860365 + -50 Combine like terms: 50 + -50 = 0 0 + x = 56.71860365 + -50 x = 56.71860365 + -50 Combine like terms: 56.71860365 + -50 = 6.71860365 x = 6.71860365 Simplifying x = 6.71860365

Subproblem 2

x + 50 = -56.71860365 Simplifying x + 50 = -56.71860365 Reorder the terms: 50 + x = -56.71860365 Solving 50 + x = -56.71860365 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-50' to each side of the equation. 50 + -50 + x = -56.71860365 + -50 Combine like terms: 50 + -50 = 0 0 + x = -56.71860365 + -50 x = -56.71860365 + -50 Combine like terms: -56.71860365 + -50 = -106.71860365 x = -106.71860365 Simplifying x = -106.71860365

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.71860365, -106.71860365}

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