500=x^2+100x-1600

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Solution for 500=x^2+100x-1600 equation:


Simplifying
500 = x2 + 100x + -1600

Reorder the terms:
500 = -1600 + 100x + x2

Solving
500 = -1600 + 100x + x2

Solving for variable 'x'.

Combine like terms: 500 + 1600 = 2100
2100 + -100x + -1x2 = -1600 + 100x + x2 + 1600 + -100x + -1x2

Reorder the terms:
2100 + -100x + -1x2 = -1600 + 1600 + 100x + -100x + x2 + -1x2

Combine like terms: -1600 + 1600 = 0
2100 + -100x + -1x2 = 0 + 100x + -100x + x2 + -1x2
2100 + -100x + -1x2 = 100x + -100x + x2 + -1x2

Combine like terms: 100x + -100x = 0
2100 + -100x + -1x2 = 0 + x2 + -1x2
2100 + -100x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
2100 + -100x + -1x2 = 0

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

Divide each side by '-1'.
-2100 + 100x + x2 = 0

Move the constant term to the right:

Add '2100' to each side of the equation.
-2100 + 100x + 2100 + x2 = 0 + 2100

Reorder the terms:
-2100 + 2100 + 100x + x2 = 0 + 2100

Combine like terms: -2100 + 2100 = 0
0 + 100x + x2 = 0 + 2100
100x + x2 = 0 + 2100

Combine like terms: 0 + 2100 = 2100
100x + x2 = 2100

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 = 2100 + 2500

Reorder the terms:
2500 + 100x + x2 = 2100 + 2500

Combine like terms: 2100 + 2500 = 4600
2500 + 100x + x2 = 4600

Factor a perfect square on the left side:
(x + 50)(x + 50) = 4600

Calculate the square root of the right side: 67.823299831

Break this problem into two subproblems by setting 
(x + 50) equal to 67.823299831 and -67.823299831.

Subproblem 1

x + 50 = 67.823299831 Simplifying x + 50 = 67.823299831 Reorder the terms: 50 + x = 67.823299831 Solving 50 + x = 67.823299831 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 = 67.823299831 + -50 Combine like terms: 50 + -50 = 0 0 + x = 67.823299831 + -50 x = 67.823299831 + -50 Combine like terms: 67.823299831 + -50 = 17.823299831 x = 17.823299831 Simplifying x = 17.823299831

Subproblem 2

x + 50 = -67.823299831 Simplifying x + 50 = -67.823299831 Reorder the terms: 50 + x = -67.823299831 Solving 50 + x = -67.823299831 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 = -67.823299831 + -50 Combine like terms: 50 + -50 = 0 0 + x = -67.823299831 + -50 x = -67.823299831 + -50 Combine like terms: -67.823299831 + -50 = -117.823299831 x = -117.823299831 Simplifying x = -117.823299831

Solution

The solution to the problem is based on the solutions from the subproblems. x = {17.823299831, -117.823299831}

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