a^2-4a=117

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Solution for a^2-4a=117 equation:


Simplifying
a2 + -4a = 117

Reorder the terms:
-4a + a2 = 117

Solving
-4a + a2 = 117

Solving for variable 'a'.

Reorder the terms:
-117 + -4a + a2 = 117 + -117

Combine like terms: 117 + -117 = 0
-117 + -4a + a2 = 0

Factor a trinomial.
(-9 + -1a)(13 + -1a) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(13 + -1a)' equal to zero and attempt to solve: Simplifying 13 + -1a = 0 Solving 13 + -1a = 0 Move all terms containing a to the left, all other terms to the right. Add '-13' to each side of the equation. 13 + -13 + -1a = 0 + -13 Combine like terms: 13 + -13 = 0 0 + -1a = 0 + -13 -1a = 0 + -13 Combine like terms: 0 + -13 = -13 -1a = -13 Divide each side by '-1'. a = 13 Simplifying a = 13

Solution

a = {-9, 13}

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