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4 October, 17:16

Evaluate 4 (a2 + 2b) - 2b when a = 2 and b = - 2.

DONE

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  1. 4 October, 17:35
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    4

    Step-by-step explanation:

    Firstly simplify your brackets ...,

    ; 4 (a^2 + 2b) = 4a^2 + 8b ... then substitute it onto the bracket

    ; 4a^2 + 8b - 2b

    ; 4a^2 + 6b ..., then substitute with the given values of a and b

    ; 4 (2) ^2) + 6 (-2)

    ; 16 - 12 = 4
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