Question

вычеслить (√5-√15)^2

Answer 1

(√5-√15)² = √5² - 2*√5 * √15 + √15² = 5 - 2√75+15 = 20-2√(25*3) = 20-2*5√3 =

=20-10√3

Answer 2

(√5-√15)^2 = √5² - 2*√5* √15 + √15² = 5 - 2*√5*√5*√3 + 15   =   20 - 10√3 =       10(2-√3)