If that's 16x2 + 72x + 81, that factors to (4x + 9)(4x + 9) or (4x + 9)2
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16x2 - 49 = 42x2 - 72 = (4x)2 - 72 = (4x - 7)(4x + 7)
The greatest common factor is 9
Factor each one and use each prime factor the most it was used in any of the numbers. 9=3x3 12=2x2x3 81=3x3x3x3 2x2x3x3x3x3=324
Yes, and this is how. 16 x 2 - 9 16x2=32, 32 - 9 =23, so 23 is your answer! Good Question!
Common factors of 72 and 112 are: 1, 2, 4, and 8.