Question

Va rog! Dau coroana ! Vreau sa fie facut elaborat,nu doar raspunsul !!

Answer 1

Răspuns:

Explicație pas cu pas:

√5 ·√6 = √(5·6) = √30

2√3 ·3√2 = 2·3·√3·√2 = 6·√(3·2) = 6√6

4√7 ·7√6 = 4·7·√7·√6 = 28·√(7·6) = 28√42

12√15:3√5 = (12:3 )·(√15:√5) = 4·√(15:5) = 4√3

28√35 : √7 = 28·√(35:7) = 28·√5

125√12 : 5√6 = (125:5)·(√12:√6) = 25·√(12:6) = 25√2

√640 : √40 = √(640:40) = √16 = 4

√495 : √55 = √(495:55) = √9 = 3

√16 : √2 + √18 = √(16:2) + √(9·2) = √8 + 3√2 = √(4·2) + 3√2 =

= 2√2 + 3√2 = √2·(2+3) = 5√2

√3 ·√15 - 2√75 = √3·√(3·5) - 2√(25·3) = √3·√3·√5 - 2·5·√3 =

= 3√5 - 10√3

√120 : √10 - √15:√5 = √(120:10) - √(15:5) = √12 - √3 =

= √(4·3) - √3 = 2√3 - √3 = √3(2-1) = √3

√100 : √2 - √40 : √5 = √(100:2) - √(40:5) = √50 - √8 =

= √(25·2) - √(4·2) = 5√2 - 2√2 = √2(5-2) = 3√2