Question: Use MATLAB to plot the polynomials y=2x4- 7x3+ 3x2+ 5x+90 and z=4x3+ 3x2- 9x+30 over the interval -4 x 5. Properly label the plot and

Use MATLAB to plot the polynomials y=2x4- 7x3+ 3x2+ 5x+90 and z=4x3+ 3x2- 9x+30 over the interval -4 x 5. Properly label the plot and each curve. The variables y and z represent current in milliamperes; the variable x represents voltage in volts.

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