How do you find the square root of -63?

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Answer 1 · 2018-06-05T17:38:39

#3isqrt(7)#

#sqrt(-63)#

first of all this is an imaginary number so we do this #sqrt(-1) = i#:

#=sqrt(63)*sqrt(-1)#

#=sqrt(63)*i#

#=sqrt(3*3*7)*i#

#=sqrt(3^2*7)*i#

#=3sqrt(7)*i#

#=3isqrt(7)#