Question

zrob c i d

Answer 1

(√5 + 1)² -2(√5 - 2 )² - (√5 - 3)(√5 +3) = 6 - 2 · 3 - 5 + 3√5 - 3√5 - 9 = -14

 

(4 - √6 )( √6 + 1 ) - 2 (2√6 - 5)² - 3(√6 - 2 ) = 4√6 +4 - 6 - √6 -2 (24 - 25) - 3√6 +6 = 4√6 + 4 - 6 -√6 +2 - 3√6 + 6 = 6