0=n(120-n)-50

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Solution for 0=n(120-n)-50 equation:


Simplifying
0 = n(120 + -1n) + -50
0 = (120 * n + -1n * n) + -50
0 = (120n + -1n2) + -50

Reorder the terms:
0 = -50 + 120n + -1n2

Solving
0 = -50 + 120n + -1n2

Solving for variable 'n'.

Combine like terms: 0 + 50 = 50
50 + -120n + n2 = -50 + 120n + -1n2 + 50 + -120n + n2

Reorder the terms:
50 + -120n + n2 = -50 + 50 + 120n + -120n + -1n2 + n2

Combine like terms: -50 + 50 = 0
50 + -120n + n2 = 0 + 120n + -120n + -1n2 + n2
50 + -120n + n2 = 120n + -120n + -1n2 + n2

Combine like terms: 120n + -120n = 0
50 + -120n + n2 = 0 + -1n2 + n2
50 + -120n + n2 = -1n2 + n2

Combine like terms: -1n2 + n2 = 0
50 + -120n + n2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-50' to each side of the equation.
50 + -120n + -50 + n2 = 0 + -50

Reorder the terms:
50 + -50 + -120n + n2 = 0 + -50

Combine like terms: 50 + -50 = 0
0 + -120n + n2 = 0 + -50
-120n + n2 = 0 + -50

Combine like terms: 0 + -50 = -50
-120n + n2 = -50

The n term is -120n.  Take half its coefficient (-60).
Square it (3600) and add it to both sides.

Add '3600' to each side of the equation.
-120n + 3600 + n2 = -50 + 3600

Reorder the terms:
3600 + -120n + n2 = -50 + 3600

Combine like terms: -50 + 3600 = 3550
3600 + -120n + n2 = 3550

Factor a perfect square on the left side:
(n + -60)(n + -60) = 3550

Calculate the square root of the right side: 59.581876439

Break this problem into two subproblems by setting 
(n + -60) equal to 59.581876439 and -59.581876439.

Subproblem 1

n + -60 = 59.581876439 Simplifying n + -60 = 59.581876439 Reorder the terms: -60 + n = 59.581876439 Solving -60 + n = 59.581876439 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '60' to each side of the equation. -60 + 60 + n = 59.581876439 + 60 Combine like terms: -60 + 60 = 0 0 + n = 59.581876439 + 60 n = 59.581876439 + 60 Combine like terms: 59.581876439 + 60 = 119.581876439 n = 119.581876439 Simplifying n = 119.581876439

Subproblem 2

n + -60 = -59.581876439 Simplifying n + -60 = -59.581876439 Reorder the terms: -60 + n = -59.581876439 Solving -60 + n = -59.581876439 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '60' to each side of the equation. -60 + 60 + n = -59.581876439 + 60 Combine like terms: -60 + 60 = 0 0 + n = -59.581876439 + 60 n = -59.581876439 + 60 Combine like terms: -59.581876439 + 60 = 0.418123561 n = 0.418123561 Simplifying n = 0.418123561

Solution

The solution to the problem is based on the solutions from the subproblems. n = {119.581876439, 0.418123561}

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