h(k)=3k3−k+3
Solution:
In general, a cubic equation is hard to solve.
There is a general solution, but it is complicated an a lot of work to do, it is much easier to do with a calculator.
For the first question we can rewrite it into
3k3−k+3=−75
3k3−k+78=0
Then we can put it into a solver and get it solved.
http://www.1728.org/cubic.htm
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