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26 September, 06:06

12a - 3b2, when a=9, b=4

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Answers (2)
  1. 26 September, 07:24
    0
    84

    Step-by-step explanation:

    substitute in the numbers so its 12x9 - 3x4x2

    108 - 24 = 84
  2. 26 September, 09:00
    0
    Step-by-step explanation:

    Write out equation

    12a-3b2

    Sub in variables and add needed signs

    12*9-3*4*2

    Solve multiplication

    108-24

    Finally, subtract

    84
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