Question

question 1 of 10 which of the following must be true for an expression to be a difference of two squares? a. both coefficients are perfect squares b. there are only two terms c. both terms have negative coefficients a. a and b b. a, b, and c c. a and c d. b and c

Explanation:

A difference - of - two - squares is of the form $a^{2}-b^{2}$, which has only two terms, and both $a^{2}$ and $b^{2}$ have coefficients (implicitly 1, which is a perfect square). The coefficients don't have to be negative.

Answer:

A. a and b