louisasbery
louisasbery
31-01-2017
Mathematics
contestada
Please help me with this.
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swalley2004
swalley2004
31-01-2017
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
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