10000=x^2-140x-500

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Solution for 10000=x^2-140x-500 equation:


Simplifying
10000 = x2 + -140x + -500

Reorder the terms:
10000 = -500 + -140x + x2

Solving
10000 = -500 + -140x + x2

Solving for variable 'x'.

Combine like terms: 10000 + 500 = 10500
10500 + 140x + -1x2 = -500 + -140x + x2 + 500 + 140x + -1x2

Reorder the terms:
10500 + 140x + -1x2 = -500 + 500 + -140x + 140x + x2 + -1x2

Combine like terms: -500 + 500 = 0
10500 + 140x + -1x2 = 0 + -140x + 140x + x2 + -1x2
10500 + 140x + -1x2 = -140x + 140x + x2 + -1x2

Combine like terms: -140x + 140x = 0
10500 + 140x + -1x2 = 0 + x2 + -1x2
10500 + 140x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
10500 + 140x + -1x2 = 0

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

Divide each side by '-1'.
-10500 + -140x + x2 = 0

Move the constant term to the right:

Add '10500' to each side of the equation.
-10500 + -140x + 10500 + x2 = 0 + 10500

Reorder the terms:
-10500 + 10500 + -140x + x2 = 0 + 10500

Combine like terms: -10500 + 10500 = 0
0 + -140x + x2 = 0 + 10500
-140x + x2 = 0 + 10500

Combine like terms: 0 + 10500 = 10500
-140x + x2 = 10500

The x term is -140x.  Take half its coefficient (-70).
Square it (4900) and add it to both sides.

Add '4900' to each side of the equation.
-140x + 4900 + x2 = 10500 + 4900

Reorder the terms:
4900 + -140x + x2 = 10500 + 4900

Combine like terms: 10500 + 4900 = 15400
4900 + -140x + x2 = 15400

Factor a perfect square on the left side:
(x + -70)(x + -70) = 15400

Calculate the square root of the right side: 124.09673646

Break this problem into two subproblems by setting 
(x + -70) equal to 124.09673646 and -124.09673646.

Subproblem 1

x + -70 = 124.09673646 Simplifying x + -70 = 124.09673646 Reorder the terms: -70 + x = 124.09673646 Solving -70 + x = 124.09673646 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '70' to each side of the equation. -70 + 70 + x = 124.09673646 + 70 Combine like terms: -70 + 70 = 0 0 + x = 124.09673646 + 70 x = 124.09673646 + 70 Combine like terms: 124.09673646 + 70 = 194.09673646 x = 194.09673646 Simplifying x = 194.09673646

Subproblem 2

x + -70 = -124.09673646 Simplifying x + -70 = -124.09673646 Reorder the terms: -70 + x = -124.09673646 Solving -70 + x = -124.09673646 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '70' to each side of the equation. -70 + 70 + x = -124.09673646 + 70 Combine like terms: -70 + 70 = 0 0 + x = -124.09673646 + 70 x = -124.09673646 + 70 Combine like terms: -124.09673646 + 70 = -54.09673646 x = -54.09673646 Simplifying x = -54.09673646

Solution

The solution to the problem is based on the solutions from the subproblems. x = {194.09673646, -54.09673646}

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