3a^2+81=36a

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Solution for 3a^2+81=36a equation:


Simplifying
3a2 + 81 = 36a

Reorder the terms:
81 + 3a2 = 36a

Solving
81 + 3a2 = 36a

Solving for variable 'a'.

Reorder the terms:
81 + -36a + 3a2 = 36a + -36a

Combine like terms: 36a + -36a = 0
81 + -36a + 3a2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(27 + -12a + a2) = 0

Factor a trinomial.
3((3 + -1a)(9 + -1a)) = 0

Ignore the factor 3.

Subproblem 1

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

Subproblem 2

Set the factor '(9 + -1a)' equal to zero and attempt to solve: Simplifying 9 + -1a = 0 Solving 9 + -1a = 0 Move all terms containing a to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1a = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1a = 0 + -9 -1a = 0 + -9 Combine like terms: 0 + -9 = -9 -1a = -9 Divide each side by '-1'. a = 9 Simplifying a = 9

Solution

a = {3, 9}

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