Someone please help me solve this equation, I have no idea what it is asking.. PLEASE.

"Solve the equation 4x^2-28x=0,check your solution(s) and state the final solution set. show all your work."
PLEASE PLEASE PLEASE HELP!

Question

Someone please help me solve this equation, I have no idea what it is asking.. PLEASE.

"Solve the equation 4x^2-28x=0,check your solution(s) and state the final solution set.  show all your work." 
PLEASE PLEASE PLEASE HELP!

anonymous · Answer

enter it in a graphing calculator like y = 4x^2 -28x the x intercepts will be your answers

anonymous · Answer

I dont have a graphing cacultor.

anonymous · Answer

hmm then 4x= square root of 28x. the problem is unsolvable, because there is no C

anonymous · Answer

will you explain to me more how you've done this? I'm expected to show my work. and what does she mean when she say sshow your final solution set?