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P is a signed integer The 2's compliment representation of 8*P is (F87B)16 2's compliment of 8*p is?? Can be easily calculated by shifting bits in left direction 3 times

I want to ask when this shifting can be done  because for (-3) i.e., (110)2 ,to obtain -6 that is multiplication of 2 is not possible by shifting the bits left once
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