1.

`((3-2i)(2 + 3i))/((1 + 2i) (2 -i))` का संयुग्मी ज्ञात कीजिए।

Answer» `((3 - 2i)(2 + 3i))/((1 + 2i) (2 -i)) = (3 (2 + 3i) - 2i (2 + 3i))/(1 (2 -i) + 2i (2 -i))`
`= (6 + 9i -4i - 6i^(2))/(2 - i + 4i - 2i^(2))`
`= (6 + 5i + 6)/(2 + 3i + 2)`
`= (12 + 5i)/(4 + 3i) xx (4 - 3i)/(4 - 3i)`
`= (12 (4 - 3i) + 5i(4 - 3i))/((4)^(2) - (3i)^(2))`
`= (48 - 36i + 20i - 15i^(2))/(16 - 9i^(2))`
`= (48 - 16i + 15)/(16 + 9) = (63 - 16i)/(25)`
अत: `((3 -2i) (2 + 3i))/((1 + 2i) (2 - i))` का संयुग्मी `(63)/(25) - (16)/(25)i`


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