Example (with steps)1. `A=5+6i,B=-2+3i,C=1-3i` Find A × B
Solution: Here `A=5+6i,B=-2+3i,C=1-3i`
`A * B`
`=(5+6i)*(-2+3i)`
`=5(-2)+5(3i)+6i(-2)+6i(3i)`
`=-10+15i-12i+18i^2`
`=-10+15i-12i+18(-1) ("Where " i^2=-1)`
`=-10+15i-12i-18`
`=-10-18+15i-12i`
`=-28+3i`
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