Question

if a+b=x and ab=y then a=? and b=?
answer this question using identities. ​

Answer 1

Answer:

a + b = x

(a+b)2=x2

a2+b2+2ab=x2 ---------------I

a - b = y

(a−b)2=y2

a2+b2−2ab=y2 ---------------II

I - II

4ab=x2−y2