Mathematics > Standard Multiple Choice

Read the following SAT test question and then click on a button to select your answer.

If (x + y)^2 = (x^2) + (y^2), which of the following statements must also be true?

Roman numeral 1. x = 0

Roman numeral 2.(x minus y)^2 = (x^2) + (y^2)

Roman numeral 3. x times y = 0

(A) None

(B) Roman numeral 1 only

(C) Roman numeral 2 only

(D) Roman numeral 3 only

(E) Roman numeral 2 and Roman numeral 3?

正確答案>>>