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9 September, 11:08

Evaluate the expression 2ab3 + 6a3 - 4ab2 when a = 2 and b = 4.

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Answers (2)
  1. 9 September, 11:15
    0
    2 (2) (4) 3+6 (2) 3-4 (2) (4) 2

    48 + 36 - 64

    74 - 64

    = 10
  2. 9 September, 11:33
    0
    2 (2x4) 3 + 6 (2) 3 - 4 (2x4) 2

    (4x8) 3 + (12) 3 - (8x16) 2

    (32) 3 + (12) 3 - (128) 2

    96 + 36 - 256

    -124
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