Mathematics, 27.08.2019 21:50 Hi1234t6

Solve 64x^3 +1 =0
the back of the texts books gives me the answers -1/4 and 1 plus or minus i√3 all over 8
i understand where the -1/4 comes from . i just don't understand the second answer. i know they used the quadratic formula to get it but i always end up with something to totally different

Answers: 1

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Solve 64x^3 +1 =0
the back of the texts books gives me the answers -1/4 and 1 plus or minus i√...