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Help with these radical/square root questions

Help with these radical/square root questions-example-1
User Lee Greco
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1 Answer

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We know that i² = -1


\heartsuit
√(-28) = √(i^2*7*2^2) = 2i√(7)


\heartsuit
√(-63) = √(i^2*7*3^2) = 3i√(7)


Given\;that\;√(-28)\;is\;subtracted\;from\;√(-63)


\implies √(-63) - √(-28) = 3i√(7) - 2i√(7) = i√(7)

Option (2) is the Answer

User Sarela
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