4n^2-93=5n

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Solution for 4n^2-93=5n equation:


Simplifying
4n2 + -93 = 5n

Reorder the terms:
-93 + 4n2 = 5n

Solving
-93 + 4n2 = 5n

Solving for variable 'n'.

Reorder the terms:
-93 + -5n + 4n2 = 5n + -5n

Combine like terms: 5n + -5n = 0
-93 + -5n + 4n2 = 0

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

Divide each side by '4'.
-23.25 + -1.25n + n2 = 0

Move the constant term to the right:

Add '23.25' to each side of the equation.
-23.25 + -1.25n + 23.25 + n2 = 0 + 23.25

Reorder the terms:
-23.25 + 23.25 + -1.25n + n2 = 0 + 23.25

Combine like terms: -23.25 + 23.25 = 0.00
0.00 + -1.25n + n2 = 0 + 23.25
-1.25n + n2 = 0 + 23.25

Combine like terms: 0 + 23.25 = 23.25
-1.25n + n2 = 23.25

The n term is -1.25n.  Take half its coefficient (-0.625).
Square it (0.390625) and add it to both sides.

Add '0.390625' to each side of the equation.
-1.25n + 0.390625 + n2 = 23.25 + 0.390625

Reorder the terms:
0.390625 + -1.25n + n2 = 23.25 + 0.390625

Combine like terms: 23.25 + 0.390625 = 23.640625
0.390625 + -1.25n + n2 = 23.640625

Factor a perfect square on the left side:
(n + -0.625)(n + -0.625) = 23.640625

Calculate the square root of the right side: 4.862162585

Break this problem into two subproblems by setting 
(n + -0.625) equal to 4.862162585 and -4.862162585.

Subproblem 1

n + -0.625 = 4.862162585 Simplifying n + -0.625 = 4.862162585 Reorder the terms: -0.625 + n = 4.862162585 Solving -0.625 + n = 4.862162585 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.625' to each side of the equation. -0.625 + 0.625 + n = 4.862162585 + 0.625 Combine like terms: -0.625 + 0.625 = 0.000 0.000 + n = 4.862162585 + 0.625 n = 4.862162585 + 0.625 Combine like terms: 4.862162585 + 0.625 = 5.487162585 n = 5.487162585 Simplifying n = 5.487162585

Subproblem 2

n + -0.625 = -4.862162585 Simplifying n + -0.625 = -4.862162585 Reorder the terms: -0.625 + n = -4.862162585 Solving -0.625 + n = -4.862162585 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.625' to each side of the equation. -0.625 + 0.625 + n = -4.862162585 + 0.625 Combine like terms: -0.625 + 0.625 = 0.000 0.000 + n = -4.862162585 + 0.625 n = -4.862162585 + 0.625 Combine like terms: -4.862162585 + 0.625 = -4.237162585 n = -4.237162585 Simplifying n = -4.237162585

Solution

The solution to the problem is based on the solutions from the subproblems. n = {5.487162585, -4.237162585}

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