Question

is this correct in simpify form / postive or negtive?
-2/3 - [- 2/7] = 14/21 + 6/21= 20/21

Answer 1

what is the [ ] notation represent here?

Answer 2

-2/7

Answer 3

so they are just brackets to indicate a grouping, ok ....

remember this, 2 -s always is +

-2/3 -- 2/7

-2/3 + 2/7 = some number

-2(3)/3 + 2(3)/7 = (3)N

-2 + 6/7 = 3N

-2(7) + 6(7)/7 = 3(7)N

-14 + 6 = 21N

-12 = 21N

-12/21 = N

-4/7 = N is what i get

Answer 4

thanks you

Answer 5

yw