[tex] x^{2} [/tex] = 16
First, take the square root to both sides.
[tex]x = [/tex] ±[tex] \sqrt{16} [/tex]
Second, now we have 4 × 4 which is 16, meaning the square root of 16 is 4.
[tex]x = [/tex] ±[tex]4[/tex]
Third, there are two solutions.
[tex]-4 \\ and \\ 4[/tex]
Fourth, since we have two values, it is reasonable to use the plus-minus sign to indicate there is a positive and a negative solution.
Answer: C) x = ±4
