Question

The solution set of |a| = 4 is
{-4}
{4}
{-4, 4}

Answer 1

-4,4

Explanation:

Absolute value is distance from 0 and both 4 and -4 are 4 numbers from 0.

Answer 2

{-4, 4}

Explanation:

There are two cases, one positive and one negative

a = 4 and a = -4