Question

sqrt 3 * sqrt 21

Answer 1

sqrt3 *sqrt(7*3) = 3sqrt7

Answer 2

thank you :)

Answer 3

\[\sqrt{21}=\sqrt{3}\times \sqrt{7}\]\[\sqrt{3} \times \sqrt{21}=\sqrt{3}\times \sqrt{3} \times \sqrt{7}\]\[\sqrt{3} \times \sqrt{3} =3 \]Therefore\[3\sqrt{7}\]

Answer 4

thanks guys, and thank you @Diyadiya for the explanation in detail! :)

Answer 5

Glad to help :)

Answer 6

can i ask one more question?

Answer 7

Sure Post it

Answer 8

\[\frac{5}{\sqrt{3}} = \frac{5 \times \sqrt{3}}{\sqrt{3} \times \sqrt{3}}\]

Answer 9

Rationalise the denominator means to remove the radical from the denominator
so we multily the numerator and denominator with the same radical ok ?
what will be the answer ?
what is sqrt 3 x sqrt 3 ?

Answer 10

3

Answer 11

Yes so answer is ?

Answer 12

i think the first one

Answer 13

Yes ,Do you understand why ?

Answer 14

i do now! :) thanks for all your help

Answer 15

No problem :)