Question

efertue : (4+i).(2-i)+3-i

Answer 1

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$(4+i).(2-i)+3-i= \\ \\ (8-4i+2i-i^2)+3-i= \\ \\ (8-2i-(-1))+3-i= \\ \\ (8-2i+1)+3-i= \\ \\ 9-2i+3-i= \\ \\ 12-3i$