With some simple rearrangement, we can rewrite the numerator as

Then factorizing the difference of squares,
, we end up with

In order to subtract fractions, you need the denominators (bottom number) to be the same.

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The volume of the shaded region is 1650 cubic feet.
Answer:
a. it has reflectional symmetry with 16 line of symmetry
Answer:
something perpendicular probably