Math pls help me?

Is trapezoid abdc the result of a dilation of trapezoid mnpq by a scale factor of ? why or why not? yes, because ab and cd are each the lengths mn and qp. yes, because sides ab and cd are parallel to sides mn and qp. no, because ab is the length mn but cd is the length qp. no, because sides ab and cd have different slopes from sides mn and qp.

Which number produces a rationale number when multiplied by 1/5

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?