Question

Which of the following equations is never true?

A. a^2 = -25

B. x^2 = 16

C. y + 4 = 10

D. 2x = 7

Answer 1

Answer: A. a² = -25

Explanation:

The square of a number can never be negative and as such a² ≠ - 25.

Proof of this is that the √-25 = 5i (aka an imaginary number).

Answer 2

A.

The square of any number will always be positive, meaning that problem A will never be true