help!! attached photo
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(4, - 7 ) or 4 - 7i
pointA( - 4, 7 ) or - 4 + 7i, hence
- 1 (- 4 + 7i ) = 4 - 7i → (4, - 7 )
check the picture below.
multiplying a vector by -1, will yield us the negative version of it, and thus a vector going in the opposite direction.