What does solve the differential equation mean?

Which sentence from this passage explains what the main characters do in rosencrantz and guildenstern are dead? "tom stoppard's play, rosencrantz and guildenstern are dead, draws on two previous theatrical works: shakespeare's hamlet and samuel beckett's waiting for godot." "as in beckett's play, rosencrantz and guildenstern pass the time by impersonating other characters, engaging in word play, and remaining silent for long periods of time." "these same two characters were also featured in a parody of hamlet, the short comic play by w. s. gilbert entitled rosencrantz and guildenstern." "gilbert's play makes rosencrantz and guildenstern into central characters and alters the storyline of hamlet."

Usually, when people talk about "rocky” relationships, it’s with a frown, but mine has enriched my life. i became fascinated with rocks when i was really young, and throughout my childhood you could usually find me with my pockets bulging from whatever stony treasures i’d scavenged that day. when my science teacher taught us a unit on geology, i realized that my fascination could become an exciting career that could also me make good money. obtaining an internship to work on the geological exhibit at the museum is an important step on my road to being a geologist. the best description of the writer’s point of view is that the person is eager to make a lot of money in a museum internship. insistent that geology should be taught as part of every science course. hopeful to be able to further the goal of eventually becoming a geologist. concerned that people do not generally relate well to the study of geology.

Find the center and the radius of the circle with the equation: x^-2x+y^2+4y+1=0