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13-05-2020
Mathematics

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Please describe to me why there are no middle terms when multiplying (x - 4) and (x + 4)

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Emilynlieber Emilynlieber

13-05-2020

Answer:

The middle terms cancel out

Step-by-step explanation:

FOIL the problem:

(x-4) * (x+4)

There are two middle terms, one positive and one negative:

x^2 + 4x - 4x -16

The positive and negative 4s cancel and you are left with just the first and last term:

x^2 - 16

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