Welcome to Bytelearn!

Let’s check out your problem:

The diagram shows a quadrilateral.$\newline$The lengths of the sides of the quadrilateral are written as expressions.$\newline$a Work out the lengths of the sides of the quadrilateral when $a=-5$ and $b=2$.$\newline$b Use your answers to part a to work out the perimeter of the quadrilate when $a=-5$ and $b=2$.$\newline$c Write an expression for the perimeter of the quadrilateral. Show that the expression can be simplified to $a+4 a^{2}+19 b$.