SOLUTION: PLease help to simplify 4i^7 - the square root of -5 times the square root of -5 + the square root of 7 times the square root of -7

SOLUTION: PLease help to simplify 4i^7 - the square root of -5 times the square root of -5 + the square root of 7 times the square root of -7 - the square root of -16

Question 66330This question is from textbook An Incremental Development
: PLease help to simplify
4i^7 - the square root of -5 times the square root of -5 + the square root of 7 times the square root of -7 - the square root of -16 This question is from textbook An Incremental Development

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
4i^7 - the square root of -5 times the square root of -5 + the square root of 7 times the square root of -7 - the square root of -16
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4(i^7)-(sqrt-5)(sqrt-5)+(sqrt7)(sqrt-7)-sqrt(-16)
=4(-i)-(-5)+7i-4i
= -4i+5+3i
=-i+5
=5-i
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Cheers,
Stan H.
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