Question

Verify the closure property for addition and multiplication for the
-5/7and 8/9
rational numbers​

Answer 1

Answer:

-5/7

383

use cp

8/9

27

use cp

Answer 2

Answer:

addition

-5/7+8/9

taking LCM of 7 and 9

9=3*3

7=7*1

LCM =3*3*7

Ans =63

therefore, we get,

=[(-5*9)+8*7]/63

=(-45+56)/63

=11/63

Subtraction

-5/7-8/9

taking LCM of 7 and 9

9=3*3

7=7*1

LCM =3*3*7

Ans =63

therefore, we get,

=[(-5*9)-(8*7)]/63

=[-45-(56)]/63

=(-45-56)/63

=-101/63

therefore it is ur solution