I need explanation for how to do qn(d) where it ask to find the shortest distance. the answer is 6.656cm by the way but i need the steps and workings

Enter the number of complex zeros for the polynomial function f(x) = x 4+ 5x² +6

What will the graph look like for a system of equations that has no solution? a. the lines will be perpendicular. b. the lines will cross at one point. c. both equations will form the same line. d. the lines will be parallel.

What is the lcm of 16 and 40 ? 24 and 40 ?