Question

Rationalize the dominator: (below)

Answer 1

\[\sqrt{81}/\sqrt{7}\]

Answer 2

\[\frac{\sqrt{81}}{\sqrt{7}}=\frac{9}{\sqrt{7}}\]then multiply it by \[\frac{\sqrt{7}}{\sqrt{7}}\]becoz it is equal to 1.then it becomes\[\frac{9}{\sqrt{7}}\times \frac{\sqrt{7}}{\sqrt{7}}=\frac{9\sqrt{7}}{7}\]

Answer 3

understood??

Answer 4

yes, thank you!

Answer 5

yw:)