Find the product. (-d + 4)(-d – 4)

Question

Find the product.

(-d + 4)(-d – 4)

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Answers ( No )

    0
    2021-09-09T01:46:29+00:00

    Use foil
    f: -d * – d = d^2
    o: -d*-4 = 4d
    i: 4 * – d = -4d
    l: -4 * 4 = -16

    d^2 + 4d – 4d – 16
    d^2 – 16 The middle two terms cancel out.

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