Question

(v) a4 - 2a-b2 + b4

Answer 1

Explanation:

a2b2+b4=8

so (a2+b2)2-a2b2=8

a2 + ab + b2 = 4 so

(a+b)2-ab=4

from 1st equation,

(a2+b2+ab)(a2+b2-2ab+ab)=8

4(4-2ab)=8

(4-2ab)=2

ab=1