0
Anonymous
f^2 + 2f = f (f + 2)
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2f + 8 = 102 Subtract 8 from both sides: 2f = 94 Divide both sides by 2: f = 47
2f
-2, 1.74 and 0.46
The g. c. f. of 21 and 84 is 21.
1, 2, 3, 4, 6, 12, F