What is the sqaure root of -180x^8

I got 6x^4 i radical 5

3 answers

me too

Usually the i comes last, though.
what do you mean it comes last
usually a complex number is written a+bi, and coefficients come before variables.

I know it is tempting to put the √5 last so it does not get confused with following numbers, but that's just orthography.

here, a is zero, so just bi:

6√5 x^4 i
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