find value of a if x
![x {3}^{} - ax {}^{2} + 6x - a x {3}^{} - ax {}^{2} + 6x - a](https://tex.z-dn.net/?f=x++%7B3%7D%5E%7B%7D++-+ax+%7B%7D%5E%7B2%7D++%2B+6x+-+a+)
is divisible by x+2
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Where I had used ( āŖ ) symbol that symbolised that it is the same and I had simplified it.
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