2a^2+9=-9a

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


Simplifying
2a2 + 9 = -9a

Reorder the terms:
9 + 2a2 = -9a

Solving
9 + 2a2 = -9a

Solving for variable 'a'.

Reorder the terms:
9 + 9a + 2a2 = -9a + 9a

Combine like terms: -9a + 9a = 0
9 + 9a + 2a2 = 0

Factor a trinomial.
(3 + a)(3 + 2a) = 0

Subproblem 1

Set the factor '(3 + a)' equal to zero and attempt to solve: Simplifying 3 + a = 0 Solving 3 + a = 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 + a = 0 + -3 Combine like terms: 3 + -3 = 0 0 + a = 0 + -3 a = 0 + -3 Combine like terms: 0 + -3 = -3 a = -3 Simplifying a = -3

Subproblem 2

Set the factor '(3 + 2a)' equal to zero and attempt to solve: Simplifying 3 + 2a = 0 Solving 3 + 2a = 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 + 2a = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 2a = 0 + -3 2a = 0 + -3 Combine like terms: 0 + -3 = -3 2a = -3 Divide each side by '2'. a = -1.5 Simplifying a = -1.5

Solution

a = {-3, -1.5}

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