4n^2-3n-4=-2

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Solution for 4n^2-3n-4=-2 equation:


Simplifying
4n2 + -3n + -4 = -2

Reorder the terms:
-4 + -3n + 4n2 = -2

Solving
-4 + -3n + 4n2 = -2

Solving for variable 'n'.

Reorder the terms:
-4 + 2 + -3n + 4n2 = -2 + 2

Combine like terms: -4 + 2 = -2
-2 + -3n + 4n2 = -2 + 2

Combine like terms: -2 + 2 = 0
-2 + -3n + 4n2 = 0

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

Divide each side by '4'.
-0.5 + -0.75n + n2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + -0.75n + 0.5 + n2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + -0.75n + n2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + -0.75n + n2 = 0 + 0.5
-0.75n + n2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
-0.75n + n2 = 0.5

The n term is -0.75n.  Take half its coefficient (-0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
-0.75n + 0.140625 + n2 = 0.5 + 0.140625

Reorder the terms:
0.140625 + -0.75n + n2 = 0.5 + 0.140625

Combine like terms: 0.5 + 0.140625 = 0.640625
0.140625 + -0.75n + n2 = 0.640625

Factor a perfect square on the left side:
(n + -0.375)(n + -0.375) = 0.640625

Calculate the square root of the right side: 0.80039053

Break this problem into two subproblems by setting 
(n + -0.375) equal to 0.80039053 and -0.80039053.

Subproblem 1

n + -0.375 = 0.80039053 Simplifying n + -0.375 = 0.80039053 Reorder the terms: -0.375 + n = 0.80039053 Solving -0.375 + n = 0.80039053 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.375' to each side of the equation. -0.375 + 0.375 + n = 0.80039053 + 0.375 Combine like terms: -0.375 + 0.375 = 0.000 0.000 + n = 0.80039053 + 0.375 n = 0.80039053 + 0.375 Combine like terms: 0.80039053 + 0.375 = 1.17539053 n = 1.17539053 Simplifying n = 1.17539053

Subproblem 2

n + -0.375 = -0.80039053 Simplifying n + -0.375 = -0.80039053 Reorder the terms: -0.375 + n = -0.80039053 Solving -0.375 + n = -0.80039053 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.375' to each side of the equation. -0.375 + 0.375 + n = -0.80039053 + 0.375 Combine like terms: -0.375 + 0.375 = 0.000 0.000 + n = -0.80039053 + 0.375 n = -0.80039053 + 0.375 Combine like terms: -0.80039053 + 0.375 = -0.42539053 n = -0.42539053 Simplifying n = -0.42539053

Solution

The solution to the problem is based on the solutions from the subproblems. n = {1.17539053, -0.42539053}

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