Question

simplify the following -15/14÷-5/21​

Answer 1

Answer:

-15 /14÷5/21

-15/14×(-21/15)

3/2×3/1

=9/2 ANS

Answer 2

Answer:

Use a  

m

÷a  

n

=(a)  

m−n

 and a  

m

×a  

n

=a  

m+n

 and a  

−m

=  

a  

m

 

1

​  

 

∴(2  

5

+2  

8

)×(2)  

−7

=(2)  

5−8

×(2)  

−7

 

=(2)  

−3

×(2)  

−7

 

=(2)  

−3−7

=(2)  

−10

=  

2  

10

 

1

​  

=  

1024

1

​