SOLUTION: Place the indicated product in the proper location on the grid. (x^2 + 4)(x^2

SOLUTION: Place the indicated product in the proper location on the grid. (x^2 + 4)(x^2 - 4)

Question 625271: Place the indicated product in the proper location on the grid.
(x^2 + 4)(x^2 - 4)
Answer by jsmallt9(3758) (Show Source): You can put this solution on YOUR website!
One could just use FOIL to multiply this. But it's faster if you realize that

exactly matches the pattern of the left side of

with the "a" replaced by and the "b" being replaced by "4". So, according to the right side of the pattern, the product will be:

which simplifies to:

P.S. You get the same answer if you use FOIL correctly.
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