57n^2+78n-30=6n+3n^2

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Solution for 57n^2+78n-30=6n+3n^2 equation:


Simplifying
57n2 + 78n + -30 = 6n + 3n2

Reorder the terms:
-30 + 78n + 57n2 = 6n + 3n2

Solving
-30 + 78n + 57n2 = 6n + 3n2

Solving for variable 'n'.

Reorder the terms:
-30 + 78n + -6n + 57n2 + -3n2 = 6n + 3n2 + -6n + -3n2

Combine like terms: 78n + -6n = 72n
-30 + 72n + 57n2 + -3n2 = 6n + 3n2 + -6n + -3n2

Combine like terms: 57n2 + -3n2 = 54n2
-30 + 72n + 54n2 = 6n + 3n2 + -6n + -3n2

Reorder the terms:
-30 + 72n + 54n2 = 6n + -6n + 3n2 + -3n2

Combine like terms: 6n + -6n = 0
-30 + 72n + 54n2 = 0 + 3n2 + -3n2
-30 + 72n + 54n2 = 3n2 + -3n2

Combine like terms: 3n2 + -3n2 = 0
-30 + 72n + 54n2 = 0

Factor out the Greatest Common Factor (GCF), '6'.
6(-5 + 12n + 9n2) = 0

Factor a trinomial.
6((-5 + -3n)(1 + -3n)) = 0

Ignore the factor 6.

Subproblem 1

Set the factor '(-5 + -3n)' equal to zero and attempt to solve: Simplifying -5 + -3n = 0 Solving -5 + -3n = 0 Move all terms containing n to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + -3n = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -3n = 0 + 5 -3n = 0 + 5 Combine like terms: 0 + 5 = 5 -3n = 5 Divide each side by '-3'. n = -1.666666667 Simplifying n = -1.666666667

Subproblem 2

Set the factor '(1 + -3n)' equal to zero and attempt to solve: Simplifying 1 + -3n = 0 Solving 1 + -3n = 0 Move all terms containing n to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -3n = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -3n = 0 + -1 -3n = 0 + -1 Combine like terms: 0 + -1 = -1 -3n = -1 Divide each side by '-3'. n = 0.3333333333 Simplifying n = 0.3333333333

Solution

n = {-1.666666667, 0.3333333333}

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