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.

I am a nursing student and do not understand math very well at all. i need help with 5 math problems . I would greatly appreciate any help out there. thanks in advance.(they are multiple choice problems.) 1) Convert this relationship to a form which has no trigonometric relationships in the answer, just numbers. [2*(tan of 15 degrees)]/[1 - tan^2 of 15 degrees] a) sqrt3 b) 3 c) (sqrt3)/3 d) 3/(sqrt3) 2) Choose the answer which completes the identity below.( i believe this is D, am i correct?) (The square of the tangent of x) + 1 = ? or alternatively written in symbols this is [tan^2(x)] + 1 = ?