3n^2-45n=-168

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Solution for 3n^2-45n=-168 equation:


Simplifying
3n2 + -45n = -168

Reorder the terms:
-45n + 3n2 = -168

Solving
-45n + 3n2 = -168

Solving for variable 'n'.

Reorder the terms:
168 + -45n + 3n2 = -168 + 168

Combine like terms: -168 + 168 = 0
168 + -45n + 3n2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(56 + -15n + n2) = 0

Factor a trinomial.
3((7 + -1n)(8 + -1n)) = 0

Ignore the factor 3.

Subproblem 1

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

Subproblem 2

Set the factor '(8 + -1n)' equal to zero and attempt to solve: Simplifying 8 + -1n = 0 Solving 8 + -1n = 0 Move all terms containing n to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -1n = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1n = 0 + -8 -1n = 0 + -8 Combine like terms: 0 + -8 = -8 -1n = -8 Divide each side by '-1'. n = 8 Simplifying n = 8

Solution

n = {7, 8}

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