Question

find the value of (xy+pq)(xy-pq) by using identies​

Answer 1

the equation = (xy + pq ) ( xy - pq)

let us use the Identity

(a+b)(a-b) = a²-b²

Here ,

a = xy

b = pq

Then ,

(xy + pq ) ( xy - pq)

= (xy)² - (pq)²

= x²y² - p²q²

the value of(xy + pq ) ( xy - pq) is

x²y² - p²q²