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The numbers below are the factor pairs of 84 (multiplied together they equal 84):
(1, 84)
(2, 42)
(3, 28)
(4, 21)
(6, 14)
(7, 12)
It is 42 times 2 = 84
84 x 4 is equal to 336.
84
9 x -7 = -84
It is 12 times 7 = 84
252
756
12x7=84
The square root of 84 is irrational and is approx 9.1652.
42 times 2 equals 84.