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(9√-81)(-10√64) is the answer -6480i? im confused
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(9√-81)(-10√64) is the answer -6480i? im confused

User Rohan Shenoy
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1 Answer

7 votes

Imaginary Numbers


i=√(-1)

Solving the Question


(9√(-81))(-10√(64))

⇒ Take out i from the first square root:


= (9i√(81))(-10√(64))

⇒ Evaluate the square roots:


= (9i*9)(-10√(64))\\= (9i*9)(-10* 8)

⇒ Multiply:


= (81i)(-10* 8)\\= (81i)(-80)\\= -6480i

Answer

-6480i

User SuperSkunk
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