4n^2+16n-8=3

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Solution for 4n^2+16n-8=3 equation:


Simplifying
4n2 + 16n + -8 = 3

Reorder the terms:
-8 + 16n + 4n2 = 3

Solving
-8 + 16n + 4n2 = 3

Solving for variable 'n'.

Reorder the terms:
-8 + -3 + 16n + 4n2 = 3 + -3

Combine like terms: -8 + -3 = -11
-11 + 16n + 4n2 = 3 + -3

Combine like terms: 3 + -3 = 0
-11 + 16n + 4n2 = 0

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

Divide each side by '4'.
-2.75 + 4n + n2 = 0

Move the constant term to the right:

Add '2.75' to each side of the equation.
-2.75 + 4n + 2.75 + n2 = 0 + 2.75

Reorder the terms:
-2.75 + 2.75 + 4n + n2 = 0 + 2.75

Combine like terms: -2.75 + 2.75 = 0.00
0.00 + 4n + n2 = 0 + 2.75
4n + n2 = 0 + 2.75

Combine like terms: 0 + 2.75 = 2.75
4n + n2 = 2.75

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 = 2.75 + 4

Reorder the terms:
4 + 4n + n2 = 2.75 + 4

Combine like terms: 2.75 + 4 = 6.75
4 + 4n + n2 = 6.75

Factor a perfect square on the left side:
(n + 2)(n + 2) = 6.75

Calculate the square root of the right side: 2.598076211

Break this problem into two subproblems by setting 
(n + 2) equal to 2.598076211 and -2.598076211.

Subproblem 1

n + 2 = 2.598076211 Simplifying n + 2 = 2.598076211 Reorder the terms: 2 + n = 2.598076211 Solving 2 + n = 2.598076211 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 = 2.598076211 + -2 Combine like terms: 2 + -2 = 0 0 + n = 2.598076211 + -2 n = 2.598076211 + -2 Combine like terms: 2.598076211 + -2 = 0.598076211 n = 0.598076211 Simplifying n = 0.598076211

Subproblem 2

n + 2 = -2.598076211 Simplifying n + 2 = -2.598076211 Reorder the terms: 2 + n = -2.598076211 Solving 2 + n = -2.598076211 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 = -2.598076211 + -2 Combine like terms: 2 + -2 = 0 0 + n = -2.598076211 + -2 n = -2.598076211 + -2 Combine like terms: -2.598076211 + -2 = -4.598076211 n = -4.598076211 Simplifying n = -4.598076211

Solution

The solution to the problem is based on the solutions from the subproblems. n = {0.598076211, -4.598076211}

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