2n^2-85=7n

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Solution for 2n^2-85=7n equation:


Simplifying
2n2 + -85 = 7n

Reorder the terms:
-85 + 2n2 = 7n

Solving
-85 + 2n2 = 7n

Solving for variable 'n'.

Reorder the terms:
-85 + -7n + 2n2 = 7n + -7n

Combine like terms: 7n + -7n = 0
-85 + -7n + 2n2 = 0

Factor a trinomial.
(-5 + -1n)(17 + -2n) = 0

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 '(17 + -2n)' equal to zero and attempt to solve: Simplifying 17 + -2n = 0 Solving 17 + -2n = 0 Move all terms containing n to the left, all other terms to the right. Add '-17' to each side of the equation. 17 + -17 + -2n = 0 + -17 Combine like terms: 17 + -17 = 0 0 + -2n = 0 + -17 -2n = 0 + -17 Combine like terms: 0 + -17 = -17 -2n = -17 Divide each side by '-2'. n = 8.5 Simplifying n = 8.5

Solution

n = {-5, 8.5}

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