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Question
Simplify : `sqrt(-16) + 3sqrt(-25) + sqrt(-36) - sqrt(-625)`
Solution
`sqrt(-16) + 3sqrt(-25) + sqrt(-36) - sqrt(-625)`
`= sqrt(16 xx -1) + 3sqrt(25 xx - 1) + sqrt(36 xx -1) - sqrt(625 xx -1)`
= 4i + 3(5i) + 6i – 25i
= 4i + 15i + 6i – 25i
= (4 + 15 + 6 – 25)i
= 0i
= 0
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