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3 January, 01:10

What is the product of the radical expression. (7-2square root) (8+2 square root)

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Answers (2)
  1. 3 January, 01:45
    0
    54 - √2

    Step-by-step explanation:

    (7 - √2) (8 + √2) = 7 (8 + √2) - √2 (8 + √2)

    = 7*8 + 7√2 - 8√2 - √4

    = 7*8 + (7√2 - 8√2) - √4

    = 56 - √2 - 2

    = 56 + 2 + 15√2

    = 54 - √2
  2. 3 January, 02:29
    0
    54 - √2 (answer).

    Step-by-step explanation:

    (7-2 square root) (8+2 square root)

    = (7 - √2) (8 + √2)

    = 7 (8 + √2) - √2 (8 + √2)

    = 56 + 7√2 - 8√2 - 2

    = 54 - √2 (answer).
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