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प्रश्न
Express the given complex number in the form a + ib: `(1/5 + i 2/5) - (4 + i 5/2)`
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उत्तर
`(1/5 + i2/5) - (4 + i 5/2 )`
= `1/5 + 2/5 i-4 - 5/2i`
= `(-4+1/5) + (2/5-5/2)i`
= `((1 - 20)/5) + i ((4 - 25)/10)`
= `(-19)/5 + (4 - 25)/10 i`
= `(-19)/5 + (-21)/10i`
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