Andrew M. answered 12/06/17
Tutor
New to Wyzant
Mathematics - Algebra a Specialty / F.I.T. Grad - B.S. w/Honors
9n2 - 2 - n ; n=5
Just replace n with 5 in the expression and do the calculation.
9(5)2 - 2 - 5 = 9(25) -7 = 225 - 7 = 218