(n+8)(4n-5)=0

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Solution for (n+8)(4n-5)=0 equation:


Simplifying
(n + 8)(4n + -5) = 0

Reorder the terms:
(8 + n)(4n + -5) = 0

Reorder the terms:
(8 + n)(-5 + 4n) = 0

Multiply (8 + n) * (-5 + 4n)
(8(-5 + 4n) + n(-5 + 4n)) = 0
((-5 * 8 + 4n * 8) + n(-5 + 4n)) = 0
((-40 + 32n) + n(-5 + 4n)) = 0
(-40 + 32n + (-5 * n + 4n * n)) = 0
(-40 + 32n + (-5n + 4n2)) = 0

Combine like terms: 32n + -5n = 27n
(-40 + 27n + 4n2) = 0

Solving
-40 + 27n + 4n2 = 0

Solving for variable 'n'.

Factor a trinomial.
(-8 + -1n)(5 + -4n) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(5 + -4n)' equal to zero and attempt to solve: Simplifying 5 + -4n = 0 Solving 5 + -4n = 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 + -4n = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -4n = 0 + -5 -4n = 0 + -5 Combine like terms: 0 + -5 = -5 -4n = -5 Divide each side by '-4'. n = 1.25 Simplifying n = 1.25

Solution

n = {-8, 1.25}

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