Question

Efectuati : (√3-√5)²

Answer 1

$( \sqrt{3} - \sqrt{5} )^2= \sqrt{3} ^2-2 \cdot \sqrt{3} \cdot \sqrt{5} + \sqrt{5} ^2=3-2 \sqrt{15} +5=8-2 \sqrt{15}$

Answer 2

(a-b)²=a²-2ab+b²
(√3-√5)²=(√3)²-2√3√5+(√5)²=3-√15+5=8-2√15