- #1

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## Homework Statement

hey guys...

i try to do multiplication of two's complement number. I'm using straightforward method, which

give me wrong answer..

i know i can't use this method.. but.. i just want to know why..

why i can't use this method?

## The Attempt at a Solution

1001 x 0101 = 0101101 which is 45.. it should be -35..