Can anyone explain how to get this answer please and thank you. I am not good at this stuff at all

Enter the number of complex zeros for the polynomial function in the box. f(x) = x+ + 5x² +6

When the solutions to each of the two equations below are graphed in the xy-coordinate plane, the graphs of the solutions intersect at two places. write the y-cordninates of the points of intersection in the boxes below in order from smallest to largest. y=2x y=x^2-3

The volume of a cube-shaped shipping container is 13,824 cubic inches. find the edge length of the shipping container.