1.

Evaluate: √−16 + 3√−25 + √−36 − √−625

Answer»

√−16 + 3√−25 + √−36 − √−625

= i√16 + 3i√25 + i√36 −i√625 

= 4i+ 15i + 6i - 25i 

= 25i - 25i 

= 0



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