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If x-3 is a factor of x^2-a x-15, then a...

If `x-3` is a factor of `x^2-a x-15`, then `a=`

Text Solution

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`x-3=0,x=3`
`3^2-a3-15=0`
`9-3a=15`
`-3a=6`
`a=-2`
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