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प्रश्न
Express the given complex number in the form a + ib: `(5i) (- 3/5 i)`
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उत्तर
`(5i) (- 3/5 i) = - 5 xx 3/5 xx i xx i`
= - 3i2
= - 3 (-1) [∵ i2 = i]
= 3 = 3 + 0i
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