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Simplifying
(11 + 2f)(11 + -2f) = 0
Multiply (11 + 2f) * (11 + -2f)
(11(11 + -2f) + 2f * (11 + -2f)) = 0
((11 * 11 + -2f * 11) + 2f * (11 + -2f)) = 0
((121 + -22f) + 2f * (11 + -2f)) = 0
(121 + -22f + (11 * 2f + -2f * 2f)) = 0
(121 + -22f + (22f + -4f2)) = 0
Combine like terms: -22f + 22f = 0
(121 + 0 + -4f2) = 0
(121 + -4f2) = 0
Solving
121 + -4f2 = 0
Solving for variable 'f'.
Move all terms containing f to the left, all other terms to the right.
Add '-121' to each side of the equation.
121 + -121 + -4f2 = 0 + -121
Combine like terms: 121 + -121 = 0
0 + -4f2 = 0 + -121
-4f2 = 0 + -121
Combine like terms: 0 + -121 = -121
-4f2 = -121
Divide each side by '-4'.
f2 = 30.25
Simplifying
f2 = 30.25
Take the square root of each side:
f = {-5.5, 5.5}
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