Question

(-2-root 3) (-2 +root 3)/(-5 + root 4) (-5 - root 4)

Answer 1

$( - 2 - \sqrt{3} )( - 2 + \sqrt{3} ) \div \\ \: \: \: \: \: \: \: \: \:( - 5 + \sqrt{4} )( - 5 - \sqrt{4} ) \\ (a + b)(a - b) = {a}^{2} - {b}^{2} \\ = > ( - 2) ^{2} - ( \sqrt{3} ) \div \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: (- 5) - ( \sqrt{4}) ^{2} \\ = (4 - 3) \div (5 - 4) = 1$
I hope it is the answer

❇❇✌✌by Sri ✌✌❇❇

Answer 2

(-2 - √3) (-2 + √3)  

(-5 +√4) (-5 - √4)

=  (-2)² - (√3)²  

    (-5)² - (√4)²

=   4 - 3  

   25 - 4

= 1/21