-2n^2-16n-90=-10n^2

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Solution for -2n^2-16n-90=-10n^2 equation:


Simplifying
-2n2 + -16n + -90 = -10n2

Reorder the terms:
-90 + -16n + -2n2 = -10n2

Solving
-90 + -16n + -2n2 = -10n2

Solving for variable 'n'.

Combine like terms: -2n2 + 10n2 = 8n2
-90 + -16n + 8n2 = -10n2 + 10n2

Combine like terms: -10n2 + 10n2 = 0
-90 + -16n + 8n2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-45 + -8n + 4n2) = 0

Factor a trinomial.
2((-5 + -2n)(9 + -2n)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-5 + -2n)' equal to zero and attempt to solve: Simplifying -5 + -2n = 0 Solving -5 + -2n = 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 + -2n = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -2n = 0 + 5 -2n = 0 + 5 Combine like terms: 0 + 5 = 5 -2n = 5 Divide each side by '-2'. n = -2.5 Simplifying n = -2.5

Subproblem 2

Set the factor '(9 + -2n)' equal to zero and attempt to solve: Simplifying 9 + -2n = 0 Solving 9 + -2n = 0 Move all terms containing n to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -2n = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -2n = 0 + -9 -2n = 0 + -9 Combine like terms: 0 + -9 = -9 -2n = -9 Divide each side by '-2'. n = 4.5 Simplifying n = 4.5

Solution

n = {-2.5, 4.5}

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