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21 July, 05:33

Find the product.

(-d + 4) (-d - 4)

-d2 - 16

d2 - 16

d2 + 16

d2 - 8d - 16

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Answers (1)
  1. 21 July, 05:41
    0
    (-d + 4) (-d - 4) = 0

    -d (-d - 4) + 4 (-d - 4) = 0

    d² + 4d - 4d - 16 = 0

    d² - 16 = 0 2nd choice.

    We can find the value of d.

    d² - 16 = 0

    d² = 16

    √d² = √16

    d = 4

    to check:

    (-4+4) (-4 - 4) = 0

    0 (-16) = 0

    0 = 0

    Multiplication property of 0. Any number multiplied by 0 is equal to 0.
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