Question

find the values no2 ans with methods

Answer 1

Answer:

Step-by-step explanation:

Using identity

(a+b)²=a²+b²+2ab

(6)²=a²+b²+2×8

36=a²+b²+16

20=a²+b²

Now,

a³+b³=(a+b)(a²+b²-ab)

a³+b³=(6)(20-8)

a³+b³=6×12

a³+b³=72

Answer 2

Answer:

342

Step-by-step explanation:

a+b =6

a=6-b...(1)

ab=8

(6-b)-b=8 (from1)

6-2b=8

-2b=8-6

-2b=2

b=2/-2

b=-1

a=6-b

a=6-(-1)

a=6+1

a=7

a^3+b^3

=7^3+(-1)^3

=343-1

=342