Question

Plzz answer this question​

Answer 1

Answer:

Using identity (a+b)(a–b) =

${a}^{2} - {b}^{2}$

Step-by-step explanation:

=

$( \sqrt{2} - \sqrt{3} )( \sqrt{2} + \sqrt{3} )$

=

${ \sqrt{2} }^{2} - { \sqrt{3} }^{2}$

$= 2 - 3 \\ = - 1$

Answer 2

Answer:

yes it's a rational number

Step-by-step explanation:

(√2-√3) (√2+√3)

= (√2)^2 - (√3)^2 ---–-----(a + b) (a-b) = (a)^2 -(b)^2

= 2-3

=. -1