Question 3 of 10
Which of the following must be true for an expression to be a difference of
two squares?
a. all variables are raised to an even power
b. there are only two terms
c. both terms have negative coefficients
OA. a, b, and c
B. a and b
OC. a and c
D. b and c


  1. A is true : you can only take the square root of an even power
    B is true: you cannot have a trinomial, only binomial or two terms
    C is FALSE: you cannot take a square root of a negative and get a real number

    B. a and b


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