Question

What is the solution set for the following equation?
x² = 16

Answer 1

Answer:

$\{4,-4\}$

Step-by-step explanation:

$~~~~x^2 = 16\\\\\implies x = \pm\sqrt{16}\\\\\implies x =\pm 4\\\\\implies x = 4 ,~ x = -4$

Answer 2

Answer:

x = 4

Step-by-step explanation:

x² = 16

We do the opposite of x² , so we $\sqrt{x}$ (square root) both sides

$\sqrt{x}$ = $\sqrt{16}$ = 4

to confirm this, we can square 4, which gets us 16.

Hope this makes sense! Feel free to ask anything further if need be.

- profparis