n^2+8=15n

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Solution for n^2+8=15n equation:


Simplifying
n2 + 8 = 15n

Reorder the terms:
8 + n2 = 15n

Solving
8 + n2 = 15n

Solving for variable 'n'.

Reorder the terms:
8 + -15n + n2 = 15n + -15n

Combine like terms: 15n + -15n = 0
8 + -15n + n2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-8' to each side of the equation.
8 + -15n + -8 + n2 = 0 + -8

Reorder the terms:
8 + -8 + -15n + n2 = 0 + -8

Combine like terms: 8 + -8 = 0
0 + -15n + n2 = 0 + -8
-15n + n2 = 0 + -8

Combine like terms: 0 + -8 = -8
-15n + n2 = -8

The n term is -15n.  Take half its coefficient (-7.5).
Square it (56.25) and add it to both sides.

Add '56.25' to each side of the equation.
-15n + 56.25 + n2 = -8 + 56.25

Reorder the terms:
56.25 + -15n + n2 = -8 + 56.25

Combine like terms: -8 + 56.25 = 48.25
56.25 + -15n + n2 = 48.25

Factor a perfect square on the left side:
(n + -7.5)(n + -7.5) = 48.25

Calculate the square root of the right side: 6.946221995

Break this problem into two subproblems by setting 
(n + -7.5) equal to 6.946221995 and -6.946221995.

Subproblem 1

n + -7.5 = 6.946221995 Simplifying n + -7.5 = 6.946221995 Reorder the terms: -7.5 + n = 6.946221995 Solving -7.5 + n = 6.946221995 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '7.5' to each side of the equation. -7.5 + 7.5 + n = 6.946221995 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + n = 6.946221995 + 7.5 n = 6.946221995 + 7.5 Combine like terms: 6.946221995 + 7.5 = 14.446221995 n = 14.446221995 Simplifying n = 14.446221995

Subproblem 2

n + -7.5 = -6.946221995 Simplifying n + -7.5 = -6.946221995 Reorder the terms: -7.5 + n = -6.946221995 Solving -7.5 + n = -6.946221995 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '7.5' to each side of the equation. -7.5 + 7.5 + n = -6.946221995 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + n = -6.946221995 + 7.5 n = -6.946221995 + 7.5 Combine like terms: -6.946221995 + 7.5 = 0.553778005 n = 0.553778005 Simplifying n = 0.553778005

Solution

The solution to the problem is based on the solutions from the subproblems. n = {14.446221995, 0.553778005}

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