9n^2-7=-18n

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Solution for 9n^2-7=-18n equation:


Simplifying
9n2 + -7 = -18n

Reorder the terms:
-7 + 9n2 = -18n

Solving
-7 + 9n2 = -18n

Solving for variable 'n'.

Reorder the terms:
-7 + 18n + 9n2 = -18n + 18n

Combine like terms: -18n + 18n = 0
-7 + 18n + 9n2 = 0

Factor a trinomial.
(-7 + -3n)(1 + -3n) = 0

Subproblem 1

Set the factor '(-7 + -3n)' equal to zero and attempt to solve: Simplifying -7 + -3n = 0 Solving -7 + -3n = 0 Move all terms containing n to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -3n = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -3n = 0 + 7 -3n = 0 + 7 Combine like terms: 0 + 7 = 7 -3n = 7 Divide each side by '-3'. n = -2.333333333 Simplifying n = -2.333333333

Subproblem 2

Set the factor '(1 + -3n)' equal to zero and attempt to solve: Simplifying 1 + -3n = 0 Solving 1 + -3n = 0 Move all terms containing n to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -3n = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -3n = 0 + -1 -3n = 0 + -1 Combine like terms: 0 + -1 = -1 -3n = -1 Divide each side by '-3'. n = 0.3333333333 Simplifying n = 0.3333333333

Solution

n = {-2.333333333, 0.3333333333}

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