n^2+16n=28

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Solution for n^2+16n=28 equation:


Simplifying
n2 + 16n = 28

Reorder the terms:
16n + n2 = 28

Solving
16n + n2 = 28

Solving for variable 'n'.

Reorder the terms:
-28 + 16n + n2 = 28 + -28

Combine like terms: 28 + -28 = 0
-28 + 16n + n2 = 0

Begin completing the square.

Move the constant term to the right:

Add '28' to each side of the equation.
-28 + 16n + 28 + n2 = 0 + 28

Reorder the terms:
-28 + 28 + 16n + n2 = 0 + 28

Combine like terms: -28 + 28 = 0
0 + 16n + n2 = 0 + 28
16n + n2 = 0 + 28

Combine like terms: 0 + 28 = 28
16n + n2 = 28

The n term is 16n.  Take half its coefficient (8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
16n + 64 + n2 = 28 + 64

Reorder the terms:
64 + 16n + n2 = 28 + 64

Combine like terms: 28 + 64 = 92
64 + 16n + n2 = 92

Factor a perfect square on the left side:
(n + 8)(n + 8) = 92

Calculate the square root of the right side: 9.591663047

Break this problem into two subproblems by setting 
(n + 8) equal to 9.591663047 and -9.591663047.

Subproblem 1

n + 8 = 9.591663047 Simplifying n + 8 = 9.591663047 Reorder the terms: 8 + n = 9.591663047 Solving 8 + n = 9.591663047 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + n = 9.591663047 + -8 Combine like terms: 8 + -8 = 0 0 + n = 9.591663047 + -8 n = 9.591663047 + -8 Combine like terms: 9.591663047 + -8 = 1.591663047 n = 1.591663047 Simplifying n = 1.591663047

Subproblem 2

n + 8 = -9.591663047 Simplifying n + 8 = -9.591663047 Reorder the terms: 8 + n = -9.591663047 Solving 8 + n = -9.591663047 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + n = -9.591663047 + -8 Combine like terms: 8 + -8 = 0 0 + n = -9.591663047 + -8 n = -9.591663047 + -8 Combine like terms: -9.591663047 + -8 = -17.591663047 n = -17.591663047 Simplifying n = -17.591663047

Solution

The solution to the problem is based on the solutions from the subproblems. n = {1.591663047, -17.591663047}

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