7n^2=84n-224

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Solution for 7n^2=84n-224 equation:


Simplifying
7n2 = 84n + -224

Reorder the terms:
7n2 = -224 + 84n

Solving
7n2 = -224 + 84n

Solving for variable 'n'.

Reorder the terms:
224 + -84n + 7n2 = -224 + 84n + 224 + -84n

Reorder the terms:
224 + -84n + 7n2 = -224 + 224 + 84n + -84n

Combine like terms: -224 + 224 = 0
224 + -84n + 7n2 = 0 + 84n + -84n
224 + -84n + 7n2 = 84n + -84n

Combine like terms: 84n + -84n = 0
224 + -84n + 7n2 = 0

Factor out the Greatest Common Factor (GCF), '7'.
7(32 + -12n + n2) = 0

Factor a trinomial.
7((4 + -1n)(8 + -1n)) = 0

Ignore the factor 7.

Subproblem 1

Set the factor '(4 + -1n)' equal to zero and attempt to solve: Simplifying 4 + -1n = 0 Solving 4 + -1n = 0 Move all terms containing n to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1n = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1n = 0 + -4 -1n = 0 + -4 Combine like terms: 0 + -4 = -4 -1n = -4 Divide each side by '-1'. n = 4 Simplifying n = 4

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 = {4, 8}

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