Question: Please try to answer in text, other wise hand writting should be very clean 15z2 Use the function R(z) - - to answer the questions

Please try to answer in text, other wise hand writting should be very clean

15z2 Use the function R(z) - - to answer the questions below. z2 + 6z - 40 (a) What values of z are not in the domain of f(z) ? Z (b) Find the zero(s) of f(z) . (c) Solve the nonlinear inequality f(z) $ 0 . Express your answer using interval

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