b^2+8b=-7

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Solution for b^2+8b=-7 equation:


Simplifying
b2 + 8b = -7

Reorder the terms:
8b + b2 = -7

Solving
8b + b2 = -7

Solving for variable 'b'.

Reorder the terms:
7 + 8b + b2 = -7 + 7

Combine like terms: -7 + 7 = 0
7 + 8b + b2 = 0

Factor a trinomial.
(7 + b)(1 + b) = 0

Subproblem 1

Set the factor '(7 + b)' equal to zero and attempt to solve: Simplifying 7 + b = 0 Solving 7 + b = 0 Move all terms containing b to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + b = 0 + -7 Combine like terms: 7 + -7 = 0 0 + b = 0 + -7 b = 0 + -7 Combine like terms: 0 + -7 = -7 b = -7 Simplifying b = -7

Subproblem 2

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

Solution

b = {-7, -1}

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