Question

Pls Friends help me please!

Answer 1

Answer:

you have to rationalise it

1/$\sqrt{10}$ -$\sqrt{9}$

= 1/$\sqrt{10}$-$\sqrt{9}$ * $\sqrt{10}$+$\sqrt{9}$/$\sqrt{10}$+$\sqrt{9}$

=1*($\sqrt{10}$+$\sqrt{9}$)/ ($\sqrt{10}$-$\sqrt{9}$)($\sqrt{10}$+$\sqrt{9}$) -----------#$b^{2}$

=$\sqrt{10}$+$\sqrt{9}$/$\sqrt{10} ^{2}$-$\sqrt{9}^{2}$

=$\sqrt{10}$+$\sqrt{9}$/10-9-------------##

=$\sqrt{10}$+$\sqrt{9}$

Step-by-step explanation:

#-- the ($\sqrt{10}$-$\sqrt{9}$)($\sqrt{10}$+$\sqrt{9}$) are in form of ($a^{2}$-$b^{2}$)

##-- the square gets cancelled because of the root

hope it was helpful :)