Which of the following represents the statement “the sum of the squares of x and y is equal to the square root of the difference of x and y”?

a. x2 + y2 =
b. x2 − y2 =
c. (x + y)2 =
d. = (x − y)2

Which of the following sentences uses an incorrect verb? a. there is only one good candidate. b. many good candidates are possible. c. a good candidate is hard to find. d. there is many possible candidates.