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23 July, 02:48

Evaluate the expression x^2+8x-4 if x=3

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  1. 23 July, 06:26
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    29

    Step-by-step explanation:

    first sub in 3 wherever x is shown

    (3) ^2+8 (3) - 4 the use bedmas (brackets, exponents, division, multiplication, addition, subtraction)

    solve brakets first

    (3) ^2=9

    8 (3) = 24

    rewrite equation; 9+24-4=29
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