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25 June, 07:38

What is the value of 4a3 - 2b2 + 5 when a = 3 and b = - 2?

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Answers (2)
  1. 25 June, 09:23
    0
    You substitute in a=3, b=-2

    4 a^3 - 2 b^2 + 5

    = 4 (3) ^3 - 2 (-2) ^2 + 5

    = 4 (27) - 2 (4) + 5

    = 108 - 8 + 5

    = 105
  2. 25 June, 11:15
    0
    You substitute a=3 and b=-2, getting:

    (36) - (-8) + 5 = 49

    Your answer is 49
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