Question

square root of 81....

Answer 1

Answer:

±9

Step-by-step explanation:

The square root of 81 is √81

= ±√9×9

= ±9

Answer 2

$\sqrt{81}$

$\mathrm{Factor\:the\:number:\:}\:81=9^2$

$=\sqrt{9^2}$

$\mathrm{Apply\:radical\:rule}:\quad \sqrt{a^2}=a,\:\quad \:a\ge 0$

$\sqrt{9^2}=9$

$=9$