b^2+11b=-18

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


Simplifying
b2 + 11b = -18

Reorder the terms:
11b + b2 = -18

Solving
11b + b2 = -18

Solving for variable 'b'.

Reorder the terms:
18 + 11b + b2 = -18 + 18

Combine like terms: -18 + 18 = 0
18 + 11b + b2 = 0

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

Subproblem 1

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

Subproblem 2

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

Solution

b = {-9, -2}

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