how to plot a polynomial?

Does anyone know how to plot this polynomial?

p(z) = z^9 + z^8 − z^7 + z^6 − z^5 + z + 1 for z real and −1 ≤ z ≤ 1

then, find and plot the roots of p(z) in the complex plane.

• Label the axes.

Please help, thank you!

Answer 1

[James Tursa]

doc polyval
doc colon
doc plots
doc roots