You need to include the radius.
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Answer: 6m</h3>
12m can be written as 6m*2
18m^2 can be written as 6m*3m
Both factorizations have '6m' in them, which shows we have a common factor. This is the greatest common factor as we cannot pull anything further out, ie, 2 and 3m have nothing in common other than 1.
Volume of a pyramid = Length x width x height / 3
A square base means both the length and width are the same.
Volume = 3 x 3 x 4 /3 = 12 square inches.
Your answer would be 3x^2 -9x -6