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Hello, I'm a little stuck on this question...
The cubic equation
has roots .i) Write down the values of
and , and express k in terms ofii) Show that
ok,I will answer you the i).
and you will find the ii) is the same via same thought.
we can get following equation because
are the roots of the equationso
,but i don't know what is the 'k' mean
so i can't express k
hope this will help
sorry If I didn't explain that clearly .
I'm not good at write in English at all,and I think I need more practice.
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