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8 September, 21:44

If x - 4 is a factor of x^2 + bx - 24, what is the value of b?

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  1. 8 September, 22:12
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    b=2

    Step-by-step explanation:

    if x-4 is a factor, then, x-4=0 hence, x=4

    sub x=4 in the equation and equate it to zero - from factor theorem

    4^2 + 4b - 24=0

    16+4b - 24=0

    4b=24-16

    4b=8

    b=8/4=2
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