2n^2-56=9n

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Solution for 2n^2-56=9n equation:


Simplifying
2n2 + -56 = 9n

Reorder the terms:
-56 + 2n2 = 9n

Solving
-56 + 2n2 = 9n

Solving for variable 'n'.

Reorder the terms:
-56 + -9n + 2n2 = 9n + -9n

Combine like terms: 9n + -9n = 0
-56 + -9n + 2n2 = 0

Factor a trinomial.
(-7 + -2n)(8 + -1n) = 0

Subproblem 1

Set the factor '(-7 + -2n)' equal to zero and attempt to solve: Simplifying -7 + -2n = 0 Solving -7 + -2n = 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 + -2n = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -2n = 0 + 7 -2n = 0 + 7 Combine like terms: 0 + 7 = 7 -2n = 7 Divide each side by '-2'. n = -3.5 Simplifying n = -3.5

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 = {-3.5, 8}

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