a^2+8a=-15

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Solution for a^2+8a=-15 equation:


Simplifying
a2 + 8a = -15

Reorder the terms:
8a + a2 = -15

Solving
8a + a2 = -15

Solving for variable 'a'.

Reorder the terms:
15 + 8a + a2 = -15 + 15

Combine like terms: -15 + 15 = 0
15 + 8a + a2 = 0

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

Subproblem 1

Set the factor '(5 + a)' equal to zero and attempt to solve: Simplifying 5 + a = 0 Solving 5 + a = 0 Move all terms containing a to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + a = 0 + -5 Combine like terms: 5 + -5 = 0 0 + a = 0 + -5 a = 0 + -5 Combine like terms: 0 + -5 = -5 a = -5 Simplifying a = -5

Subproblem 2

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

Solution

a = {-5, -3}

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