Question

. Which of the following statements is not true?

a. If x = 1, then x² = 1.
b. If x²= 1, then x = 1.
c. If x=-1, then x² = 1.
d. x² = 1.if and only if x = 1 or x = -1.

Answer 1

If x^2 = 1, then x = 1 is NOT true because x can also be -1.