n^2-6n-89=0

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Solution for n^2-6n-89=0 equation:


Simplifying
n2 + -6n + -89 = 0

Reorder the terms:
-89 + -6n + n2 = 0

Solving
-89 + -6n + n2 = 0

Solving for variable 'n'.

Begin completing the square.

Move the constant term to the right:

Add '89' to each side of the equation.
-89 + -6n + 89 + n2 = 0 + 89

Reorder the terms:
-89 + 89 + -6n + n2 = 0 + 89

Combine like terms: -89 + 89 = 0
0 + -6n + n2 = 0 + 89
-6n + n2 = 0 + 89

Combine like terms: 0 + 89 = 89
-6n + n2 = 89

The n term is -6n.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6n + 9 + n2 = 89 + 9

Reorder the terms:
9 + -6n + n2 = 89 + 9

Combine like terms: 89 + 9 = 98
9 + -6n + n2 = 98

Factor a perfect square on the left side:
(n + -3)(n + -3) = 98

Calculate the square root of the right side: 9.899494937

Break this problem into two subproblems by setting 
(n + -3) equal to 9.899494937 and -9.899494937.

Subproblem 1

n + -3 = 9.899494937 Simplifying n + -3 = 9.899494937 Reorder the terms: -3 + n = 9.899494937 Solving -3 + n = 9.899494937 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + n = 9.899494937 + 3 Combine like terms: -3 + 3 = 0 0 + n = 9.899494937 + 3 n = 9.899494937 + 3 Combine like terms: 9.899494937 + 3 = 12.899494937 n = 12.899494937 Simplifying n = 12.899494937

Subproblem 2

n + -3 = -9.899494937 Simplifying n + -3 = -9.899494937 Reorder the terms: -3 + n = -9.899494937 Solving -3 + n = -9.899494937 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + n = -9.899494937 + 3 Combine like terms: -3 + 3 = 0 0 + n = -9.899494937 + 3 n = -9.899494937 + 3 Combine like terms: -9.899494937 + 3 = -6.899494937 n = -6.899494937 Simplifying n = -6.899494937

Solution

The solution to the problem is based on the solutions from the subproblems. n = {12.899494937, -6.899494937}

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