2n^2-8n-16=0

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Solution for 2n^2-8n-16=0 equation:


Simplifying
2n2 + -8n + -16 = 0

Reorder the terms:
-16 + -8n + 2n2 = 0

Solving
-16 + -8n + 2n2 = 0

Solving for variable 'n'.

Factor out the Greatest Common Factor (GCF), '2'.
2(-8 + -4n + n2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-8 + -4n + n2)' equal to zero and attempt to solve: Simplifying -8 + -4n + n2 = 0 Solving -8 + -4n + n2 = 0 Begin completing the square. Move the constant term to the right: Add '8' to each side of the equation. -8 + -4n + 8 + n2 = 0 + 8 Reorder the terms: -8 + 8 + -4n + n2 = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -4n + n2 = 0 + 8 -4n + n2 = 0 + 8 Combine like terms: 0 + 8 = 8 -4n + n2 = 8 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 = 8 + 4 Reorder the terms: 4 + -4n + n2 = 8 + 4 Combine like terms: 8 + 4 = 12 4 + -4n + n2 = 12 Factor a perfect square on the left side: (n + -2)(n + -2) = 12 Calculate the square root of the right side: 3.464101615 Break this problem into two subproblems by setting (n + -2) equal to 3.464101615 and -3.464101615.

Subproblem 1

n + -2 = 3.464101615 Simplifying n + -2 = 3.464101615 Reorder the terms: -2 + n = 3.464101615 Solving -2 + n = 3.464101615 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 = 3.464101615 + 2 Combine like terms: -2 + 2 = 0 0 + n = 3.464101615 + 2 n = 3.464101615 + 2 Combine like terms: 3.464101615 + 2 = 5.464101615 n = 5.464101615 Simplifying n = 5.464101615

Subproblem 2

n + -2 = -3.464101615 Simplifying n + -2 = -3.464101615 Reorder the terms: -2 + n = -3.464101615 Solving -2 + n = -3.464101615 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 = -3.464101615 + 2 Combine like terms: -2 + 2 = 0 0 + n = -3.464101615 + 2 n = -3.464101615 + 2 Combine like terms: -3.464101615 + 2 = -1.464101615 n = -1.464101615 Simplifying n = -1.464101615

Solution

The solution to the problem is based on the solutions from the subproblems. n = {5.464101615, -1.464101615}

Solution

n = {5.464101615, -1.464101615}

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