Question

(root13+root5)(root13-root5)

Answer 1

Heya ✋

Let see your answer !!!!

$( \sqrt{13} + \sqrt{5})( \sqrt{13} - \sqrt{5}) \\ we \: apply \: this \: formula \: here \\ (a + b)(a - b) = a ^{2} - b ^{2} \\ ( \sqrt{13} ^{2} - \sqrt{5} ^{2} ) \\ = 13 - 5 \\ = 8$



Thanks :))))