n^2+4n-60=40

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Solution for n^2+4n-60=40 equation:


Simplifying
n2 + 4n + -60 = 40

Reorder the terms:
-60 + 4n + n2 = 40

Solving
-60 + 4n + n2 = 40

Solving for variable 'n'.

Reorder the terms:
-60 + -40 + 4n + n2 = 40 + -40

Combine like terms: -60 + -40 = -100
-100 + 4n + n2 = 40 + -40

Combine like terms: 40 + -40 = 0
-100 + 4n + n2 = 0

Begin completing the square.

Move the constant term to the right:

Add '100' to each side of the equation.
-100 + 4n + 100 + n2 = 0 + 100

Reorder the terms:
-100 + 100 + 4n + n2 = 0 + 100

Combine like terms: -100 + 100 = 0
0 + 4n + n2 = 0 + 100
4n + n2 = 0 + 100

Combine like terms: 0 + 100 = 100
4n + n2 = 100

The n term is 4n.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4n + 4 + n2 = 100 + 4

Reorder the terms:
4 + 4n + n2 = 100 + 4

Combine like terms: 100 + 4 = 104
4 + 4n + n2 = 104

Factor a perfect square on the left side:
(n + 2)(n + 2) = 104

Calculate the square root of the right side: 10.198039027

Break this problem into two subproblems by setting 
(n + 2) equal to 10.198039027 and -10.198039027.

Subproblem 1

n + 2 = 10.198039027 Simplifying n + 2 = 10.198039027 Reorder the terms: 2 + n = 10.198039027 Solving 2 + n = 10.198039027 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + n = 10.198039027 + -2 Combine like terms: 2 + -2 = 0 0 + n = 10.198039027 + -2 n = 10.198039027 + -2 Combine like terms: 10.198039027 + -2 = 8.198039027 n = 8.198039027 Simplifying n = 8.198039027

Subproblem 2

n + 2 = -10.198039027 Simplifying n + 2 = -10.198039027 Reorder the terms: 2 + n = -10.198039027 Solving 2 + n = -10.198039027 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + n = -10.198039027 + -2 Combine like terms: 2 + -2 = 0 0 + n = -10.198039027 + -2 n = -10.198039027 + -2 Combine like terms: -10.198039027 + -2 = -12.198039027 n = -12.198039027 Simplifying n = -12.198039027

Solution

The solution to the problem is based on the solutions from the subproblems. n = {8.198039027, -12.198039027}

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