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Re: If 2x^2 - 3x - m is divisible by (x - 3) what is m?
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19 Jan 2012, 12:45

1

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Topic moved to PS subforum.

Splendidgirl666 wrote:

Hi guys, have a question here:

If 2x^2 -3x -m is divisible by (x-3) what is m?

1. -18 2. -9 3.-6 4. 9 5. 18

Thanks! PS: I got right about the absolute value of the answer, but not its sign. So what wondering what is the rule to follow...

Since \(x-3\) is a factor of \(2x^2-3x-m\), then it can be factored as \((x-3)(2x+k)\) (notice we used 2x in the second factor as we need to get 2x^2)--> \(2x^2-3x-m=(x-3)(2x+k)=2x^2-(6-k)x-3k\) --> \(6-k=3\) --> \(k=3\) --> \(m=3k=9\).

Re: If 2x^2 - 3x - m is divisible by (x - 3) what is m?
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27 Sep 2017, 09:04

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