Which statement is NOT true?

Question

x2 = 100 if and only if x = 10 or x = –10.

If x2 = 100, then x = 10.

If x = 10, then x2 = 100.

If x = –10, then x2 = 100.

Answer 1

The statement "If x = –10, then x2 = 100" is NOT true.