Question

Đưa một thừa số ra ngoài dấu căn:

a) $\sqrt{50a}$;

b) $\sqrt{75 x}$.

Answer 1

a/ \(\sqrt{50a}=5\sqrt{2a}\)

b/ \(\sqrt{75x}=5\sqrt{3x}\)

Answer 2

a)\(5\sqrt{2a}\)

b)\(5\sqrt{3x}\)

Answer 3

a) \(\sqrt{50a}=\sqrt{25.2}=5\sqrt{2a}\)

b) \(\sqrt{75x}=\sqrt{25.3x}=5\sqrt{3x}\)

Answer 4

a) \(\sqrt{50a}=\sqrt{25.2a}=5\sqrt{2a}\)                b)\(\sqrt{75x}=\sqrt{25.3a}=5\sqrt{3a}\)

Answer 5

\(\sqrt{50a}=5\sqrt{2a}\)

\(\sqrt{75a}=5\sqrt{3a}\)

Answer 6

5 căn 2a 

5 căn 3x 

 

Answer 7

a) 5√2x

b) 5√3x

Answer 8

a) 5√2a

b) 5√3a

Answer 9

a. \(5\sqrt{2a}\)

b. \(5\sqrt{3x}\)

Answer 10

a) 5căn 2a

b) 5căn 3x

Answer 11

a) 5 can 2a

b) 5 can 3x

 

Answer 12

a,5√2a

b,5√3a

Answer 13

a) \(\sqrt{50a}=\sqrt{25\cdot2a}=5\sqrt{2a}\)

b) \(\sqrt{75x}=\sqrt{25\cdot3x}=5\sqrt{3x}\)

Answer 14

a) \(\sqrt{50a}=5\sqrt{2a}\)

b) \(\sqrt{75x}=5\sqrt{3x}\)

Answer 15

\(a.\sqrt{50a}=\sqrt{25.2.a}=5\sqrt{2a}\)

\(b.\sqrt{75x}=\sqrt{25.3.x}=5\sqrt{3x}\)

Answer 16

a - 5V2a

b-5V3x

Answer 17

\(5\sqrt{2a}\)

b) \(5\sqrt{3x}\)

Answer 18

  

Answer 19

a, \(\sqrt{50a}=\sqrt{25.2}=5\sqrt{2a}\)

b, \(\sqrt{75x}=\sqrt{25.3x}=5\sqrt{3x}\)

Answer 20

a) \sqrt{50a}=\sqrt{25.2a}=5\sqrt{2a}50a​=25.2a​=52a​               

b)\sqrt{75x}=\sqrt{25.3a}=5\sqrt{3a}75x​=25.3x​=53x​
 

\sqrt{75x}=5\sqrt{3x}=

Answer 21

a, 5\(\sqrt{2a}\)

b, 5\(\sqrt{3x}\)

Answer 22

  

Answer 23

 

 

 

V50a = 5V2a

V75x = 5V3x

Answer 24

a, √50                                                                  b, √75x 

=√25.2                                                                   =√25.3

=√5².2                                                                   =√5².3

=5√2                                                                      = 5√3

Answer 25

a, √50a = √25.2a = 5√2a

b, √75x = √25.3x = 5√3x

Answer 26

     

Answer 27

a) 5√2a

​

 b)5√3a

Answer 28

a)\(\sqrt{50a}=\sqrt{25.5}=5\sqrt{2a}\)

b)\(\sqrt{75x}=\sqrt{25.3}=5\sqrt{3x}\)

Answer 29

a,√50a= 25√2a = 5^2√2a = 5√2a

b,√75x= 25√3a = 5^2√3a = 5√3a

Answer 30

a  \(\sqrt{50a=\sqrt{ }25.2a=5\sqrt{ }2a}\)

b\(\sqrt{75x=\sqrt{ }25.3x=5\sqrt{ }3x}\)