Idon't understand how to do long division. can somebody explain it to me?

What is the missing step in this proof ?

Two students were asked if they liked to read. is this a good example of a statistical question? why or why not? a yes, this is a good statistical question because a variety of answers are given. b yes, this is a good statistical question because there are not a variety of answers that could be given. c no, this is not a good statistical question because there are not a variety of answers that could be given. no, this is not a good statistical question because there are a variety of answers that could be given

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.