Question: trigonometry help please

Anyone help me with thes practice problems i've done like 25 others. I am not sure if iam simply brain fried at this point or if i truly don't understand. Any help is appreciated thanks, florida nurse #1) Solve x(2x+3)= -4 possible answers are as follows a) [-5 +-i(sqrt23)/3] b)[-2 +-i(sqrt21)]/4 c)[-3 +-i(sqrt23)]/4 d)[+4 +-i(sqrt23)]/5 #2) Find the polar equation for the graph of a circle which is centered at the origin of a graph (0,0) and the equation of the graph is x^2 +y^2= 4. any and all help is much appreciated.
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