Which expression does not have a difference of two squares as at least one of its factors?
a) x^3-36x
b) 5x^2-45
c) 3x^2-6
d) 3x^3-48x

Proceed as in example 3 in section 6.1 to rewrite the given expression using a single power series whose general term involves xk. ∞ n(n − 1)cnxn − 2 n = 2 − 4 ∞ ncnxn n = 1 + ∞ cnxn n = 0

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?