2n^2-79=4n-9

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Solution for 2n^2-79=4n-9 equation:


Simplifying
2n2 + -79 = 4n + -9

Reorder the terms:
-79 + 2n2 = 4n + -9

Reorder the terms:
-79 + 2n2 = -9 + 4n

Solving
-79 + 2n2 = -9 + 4n

Solving for variable 'n'.

Reorder the terms:
-79 + 9 + -4n + 2n2 = -9 + 4n + 9 + -4n

Combine like terms: -79 + 9 = -70
-70 + -4n + 2n2 = -9 + 4n + 9 + -4n

Reorder the terms:
-70 + -4n + 2n2 = -9 + 9 + 4n + -4n

Combine like terms: -9 + 9 = 0
-70 + -4n + 2n2 = 0 + 4n + -4n
-70 + -4n + 2n2 = 4n + -4n

Combine like terms: 4n + -4n = 0
-70 + -4n + 2n2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-35 + -2n + n2) = 0

Factor a trinomial.
2((-5 + -1n)(7 + -1n)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-5 + -1n)' equal to zero and attempt to solve: Simplifying -5 + -1n = 0 Solving -5 + -1n = 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 + -1n = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -1n = 0 + 5 -1n = 0 + 5 Combine like terms: 0 + 5 = 5 -1n = 5 Divide each side by '-1'. n = -5 Simplifying n = -5

Subproblem 2

Set the factor '(7 + -1n)' equal to zero and attempt to solve: Simplifying 7 + -1n = 0 Solving 7 + -1n = 0 Move all terms containing n to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1n = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1n = 0 + -7 -1n = 0 + -7 Combine like terms: 0 + -7 = -7 -1n = -7 Divide each side by '-1'. n = 7 Simplifying n = 7

Solution

n = {-5, 7}

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