Question

How do i solve s^2=81

Answer 1

s=9, and s=-9 is the right answer. First you had to x²=f(a) the solutions are x=√f(a), or -√f(a), and it gave us, $s=\sqrt{81}, or s=-\sqrt{81}$. Then you can by the factor of numbers, and it gave us, $\sqrt{9^2}$, or $\sqrt{9^2}=9$. $-\sqrt{81}$, $\sqrt{81}=9$, $=-9$. And it gave us the answer is s=9, or s=-9 is the right answer. Hope this helps! And thank you for posting your question at here on brainly, and have a great day. -Charlie

Answer 2

$s^2=81\\\\s=-9 \vee s=9$