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Simplifying
(b + 11)(b + -11) = 0
Reorder the terms:
(11 + b)(b + -11) = 0
Reorder the terms:
(11 + b)(-11 + b) = 0
Multiply (11 + b) * (-11 + b)
(11(-11 + b) + b(-11 + b)) = 0
((-11 * 11 + b * 11) + b(-11 + b)) = 0
((-121 + 11b) + b(-11 + b)) = 0
(-121 + 11b + (-11 * b + b * b)) = 0
(-121 + 11b + (-11b + b2)) = 0
Combine like terms: 11b + -11b = 0
(-121 + 0 + b2) = 0
(-121 + b2) = 0
Solving
-121 + b2 = 0
Solving for variable 'b'.
Move all terms containing b to the left, all other terms to the right.
Add '121' to each side of the equation.
-121 + 121 + b2 = 0 + 121
Combine like terms: -121 + 121 = 0
0 + b2 = 0 + 121
b2 = 0 + 121
Combine like terms: 0 + 121 = 121
b2 = 121
Simplifying
b2 = 121
Take the square root of each side:
b = {-11, 11}
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