80000=x^2+2400x-1320000

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Solution for 80000=x^2+2400x-1320000 equation:


Simplifying
80000 = x2 + 2400x + -1320000

Reorder the terms:
80000 = -1320000 + 2400x + x2

Solving
80000 = -1320000 + 2400x + x2

Solving for variable 'x'.

Combine like terms: 80000 + 1320000 = 1400000
1400000 + -2400x + -1x2 = -1320000 + 2400x + x2 + 1320000 + -2400x + -1x2

Reorder the terms:
1400000 + -2400x + -1x2 = -1320000 + 1320000 + 2400x + -2400x + x2 + -1x2

Combine like terms: -1320000 + 1320000 = 0
1400000 + -2400x + -1x2 = 0 + 2400x + -2400x + x2 + -1x2
1400000 + -2400x + -1x2 = 2400x + -2400x + x2 + -1x2

Combine like terms: 2400x + -2400x = 0
1400000 + -2400x + -1x2 = 0 + x2 + -1x2
1400000 + -2400x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
1400000 + -2400x + -1x2 = 0

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

Divide each side by '-1'.
-1400000 + 2400x + x2 = 0

Move the constant term to the right:

Add '1400000' to each side of the equation.
-1400000 + 2400x + 1400000 + x2 = 0 + 1400000

Reorder the terms:
-1400000 + 1400000 + 2400x + x2 = 0 + 1400000

Combine like terms: -1400000 + 1400000 = 0
0 + 2400x + x2 = 0 + 1400000
2400x + x2 = 0 + 1400000

Combine like terms: 0 + 1400000 = 1400000
2400x + x2 = 1400000

The x term is 2400x.  Take half its coefficient (1200).
Square it (1440000) and add it to both sides.

Add '1440000' to each side of the equation.
2400x + 1440000 + x2 = 1400000 + 1440000

Reorder the terms:
1440000 + 2400x + x2 = 1400000 + 1440000

Combine like terms: 1400000 + 1440000 = 2840000
1440000 + 2400x + x2 = 2840000

Factor a perfect square on the left side:
(x + 1200)(x + 1200) = 2840000

Calculate the square root of the right side: 1685.229954635

Break this problem into two subproblems by setting 
(x + 1200) equal to 1685.229954635 and -1685.229954635.

Subproblem 1

x + 1200 = 1685.229954635 Simplifying x + 1200 = 1685.229954635 Reorder the terms: 1200 + x = 1685.229954635 Solving 1200 + x = 1685.229954635 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1200' to each side of the equation. 1200 + -1200 + x = 1685.229954635 + -1200 Combine like terms: 1200 + -1200 = 0 0 + x = 1685.229954635 + -1200 x = 1685.229954635 + -1200 Combine like terms: 1685.229954635 + -1200 = 485.229954635 x = 485.229954635 Simplifying x = 485.229954635

Subproblem 2

x + 1200 = -1685.229954635 Simplifying x + 1200 = -1685.229954635 Reorder the terms: 1200 + x = -1685.229954635 Solving 1200 + x = -1685.229954635 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1200' to each side of the equation. 1200 + -1200 + x = -1685.229954635 + -1200 Combine like terms: 1200 + -1200 = 0 0 + x = -1685.229954635 + -1200 x = -1685.229954635 + -1200 Combine like terms: -1685.229954635 + -1200 = -2885.229954635 x = -2885.229954635 Simplifying x = -2885.229954635

Solution

The solution to the problem is based on the solutions from the subproblems. x = {485.229954635, -2885.229954635}

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