4n^2-9=9n

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Solution for 4n^2-9=9n equation:


Simplifying
4n2 + -9 = 9n

Reorder the terms:
-9 + 4n2 = 9n

Solving
-9 + 4n2 = 9n

Solving for variable 'n'.

Reorder the terms:
-9 + -9n + 4n2 = 9n + -9n

Combine like terms: 9n + -9n = 0
-9 + -9n + 4n2 = 0

Factor a trinomial.
(-3 + -4n)(3 + -1n) = 0

Subproblem 1

Set the factor '(-3 + -4n)' equal to zero and attempt to solve: Simplifying -3 + -4n = 0 Solving -3 + -4n = 0 Move all terms containing n to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -4n = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -4n = 0 + 3 -4n = 0 + 3 Combine like terms: 0 + 3 = 3 -4n = 3 Divide each side by '-4'. n = -0.75 Simplifying n = -0.75

Subproblem 2

Set the factor '(3 + -1n)' equal to zero and attempt to solve: Simplifying 3 + -1n = 0 Solving 3 + -1n = 0 Move all terms containing n to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1n = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1n = 0 + -3 -1n = 0 + -3 Combine like terms: 0 + -3 = -3 -1n = -3 Divide each side by '-1'. n = 3 Simplifying n = 3

Solution

n = {-0.75, 3}

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