Respuesta :

swalley2004
the area is then (-x+19) * (-x+15)

so you use F.O.I.L to get

-x*-x + 19*-x + 15*-x + 15*19

x^2 -19x-15x+285

the perimeter is 2(-x+19) + 2(-x+15)

you then multiply out to get
(-2x+38) + (-2x+30)

so it is -4x + 68