Question
find all complex zeros for the following polynomial function please show all your work
f(x) = x^3 - 125
????????
f(x) = x^3 - 125
????????
Answers
Reiny
we have a difference of cubes
x^3 - 125 = (x-5)(x^2 + 5x + 25)
the quadratic has complex roots of
x = (-5 ± √-75)/2
= (-5 ± 5√-3)/2
= (-5 ± 5√3 i )/2
x^3 - 125 = (x-5)(x^2 + 5x + 25)
the quadratic has complex roots of
x = (-5 ± √-75)/2
= (-5 ± 5√-3)/2
= (-5 ± 5√3 i )/2
sue
what does the question mark mean????
Anonymous
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