-n^2+6n+19=2

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Solution for -n^2+6n+19=2 equation:


Simplifying
-1n2 + 6n + 19 = 2

Reorder the terms:
19 + 6n + -1n2 = 2

Solving
19 + 6n + -1n2 = 2

Solving for variable 'n'.

Reorder the terms:
19 + -2 + 6n + -1n2 = 2 + -2

Combine like terms: 19 + -2 = 17
17 + 6n + -1n2 = 2 + -2

Combine like terms: 2 + -2 = 0
17 + 6n + -1n2 = 0

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

Divide each side by '-1'.
-17 + -6n + n2 = 0

Move the constant term to the right:

Add '17' to each side of the equation.
-17 + -6n + 17 + n2 = 0 + 17

Reorder the terms:
-17 + 17 + -6n + n2 = 0 + 17

Combine like terms: -17 + 17 = 0
0 + -6n + n2 = 0 + 17
-6n + n2 = 0 + 17

Combine like terms: 0 + 17 = 17
-6n + n2 = 17

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 = 17 + 9

Reorder the terms:
9 + -6n + n2 = 17 + 9

Combine like terms: 17 + 9 = 26
9 + -6n + n2 = 26

Factor a perfect square on the left side:
(n + -3)(n + -3) = 26

Calculate the square root of the right side: 5.099019514

Break this problem into two subproblems by setting 
(n + -3) equal to 5.099019514 and -5.099019514.

Subproblem 1

n + -3 = 5.099019514 Simplifying n + -3 = 5.099019514 Reorder the terms: -3 + n = 5.099019514 Solving -3 + n = 5.099019514 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 = 5.099019514 + 3 Combine like terms: -3 + 3 = 0 0 + n = 5.099019514 + 3 n = 5.099019514 + 3 Combine like terms: 5.099019514 + 3 = 8.099019514 n = 8.099019514 Simplifying n = 8.099019514

Subproblem 2

n + -3 = -5.099019514 Simplifying n + -3 = -5.099019514 Reorder the terms: -3 + n = -5.099019514 Solving -3 + n = -5.099019514 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 = -5.099019514 + 3 Combine like terms: -3 + 3 = 0 0 + n = -5.099019514 + 3 n = -5.099019514 + 3 Combine like terms: -5.099019514 + 3 = -2.099019514 n = -2.099019514 Simplifying n = -2.099019514

Solution

The solution to the problem is based on the solutions from the subproblems. n = {8.099019514, -2.099019514}

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