a^2+11a=-18

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Solution for a^2+11a=-18 equation:


Simplifying
a2 + 11a = -18

Reorder the terms:
11a + a2 = -18

Solving
11a + a2 = -18

Solving for variable 'a'.

Reorder the terms:
18 + 11a + a2 = -18 + 18

Combine like terms: -18 + 18 = 0
18 + 11a + a2 = 0

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

Subproblem 1

Set the factor '(9 + a)' equal to zero and attempt to solve: Simplifying 9 + a = 0 Solving 9 + a = 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 + a = 0 + -9 Combine like terms: 9 + -9 = 0 0 + a = 0 + -9 a = 0 + -9 Combine like terms: 0 + -9 = -9 a = -9 Simplifying a = -9

Subproblem 2

Set the factor '(2 + a)' equal to zero and attempt to solve: Simplifying 2 + a = 0 Solving 2 + a = 0 Move all terms containing a to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + a = 0 + -2 Combine like terms: 2 + -2 = 0 0 + a = 0 + -2 a = 0 + -2 Combine like terms: 0 + -2 = -2 a = -2 Simplifying a = -2

Solution

a = {-9, -2}

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