Question

solve both ques of attachment​

Answer 1

Heya mate!!

In first ques we observe that √12 can be written in the form of 2√3

So lets multiply it with 5 coz 5 is in multiplication with √12

$6 \sqrt{3} + 10 \sqrt{3} \\ 16 \sqrt{3}$

In second ques we observe a identity

The identity is

${x}^{2} - {y}^{2} = (x + y)(x - y)$

So lets apply this identity

$( - 3 + \sqrt{5} )( - 3 - \sqrt{5} ) \\ { - 3}^{2} - { \sqrt{5} }^{2} \\ 9 - 5 \\ 4$

Hope it helps u dear☺️❤️☺️