8a=a^2-9

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Solution for 8a=a^2-9 equation:


Simplifying
8a = a2 + -9

Reorder the terms:
8a = -9 + a2

Solving
8a = -9 + a2

Solving for variable 'a'.

Reorder the terms:
9 + 8a + -1a2 = -9 + a2 + 9 + -1a2

Reorder the terms:
9 + 8a + -1a2 = -9 + 9 + a2 + -1a2

Combine like terms: -9 + 9 = 0
9 + 8a + -1a2 = 0 + a2 + -1a2
9 + 8a + -1a2 = a2 + -1a2

Combine like terms: a2 + -1a2 = 0
9 + 8a + -1a2 = 0

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

Solution

a = {9, -1}

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