4n^2=-40+28n

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Solution for 4n^2=-40+28n equation:


Simplifying
4n2 = -40 + 28n

Solving
4n2 = -40 + 28n

Solving for variable 'n'.

Reorder the terms:
40 + -28n + 4n2 = -40 + 28n + 40 + -28n

Reorder the terms:
40 + -28n + 4n2 = -40 + 40 + 28n + -28n

Combine like terms: -40 + 40 = 0
40 + -28n + 4n2 = 0 + 28n + -28n
40 + -28n + 4n2 = 28n + -28n

Combine like terms: 28n + -28n = 0
40 + -28n + 4n2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(10 + -7n + n2) = 0

Factor a trinomial.
4((2 + -1n)(5 + -1n)) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(2 + -1n)' equal to zero and attempt to solve: Simplifying 2 + -1n = 0 Solving 2 + -1n = 0 Move all terms containing n to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1n = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1n = 0 + -2 -1n = 0 + -2 Combine like terms: 0 + -2 = -2 -1n = -2 Divide each side by '-1'. n = 2 Simplifying n = 2

Subproblem 2

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

Solution

n = {2, 5}

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