Question

if a+b=6 and ab =8 then evaluate i) a² + b² ii) a - b​

Answer 1

Answer:

i) is 20

ii)is 2

Step-by-step explanation:

Answer 2

Answer:

(a+b)^2=a^2+b^2+2ab

36=a^2+b^2+2*8

a^2+b^2=36-16

=20

ii)

(a-b)^2=a^2+b^2-2ab

=20-2*8

using result of i)

(a-b)^2=20-16

(a-b)^2=4

(a-b)=2