Question 1176561
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In my solution,  I will assume that  U  and  V  are positive real numbers.



The modulus is    {{{sqrt((-3)^2 + (-4)^2)}}} = {{{sqrt(16+25)}}} = {{{sqrt(25)}}} = 5.



The angle is    {{{alpha)}}} = {{{arctan((-4)/(-3))}}} + {{{pi}}} = {{{arctan(4/3)}}} + {{{pi}}}.



The polar form is    ({{{5}}}, {{{alpha}}}).
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