Question

(4x+5y+4x-5y)(4x+5y-4x-5y) = 80xy is it or not

Answer 1

Answer:

yes

Step-by-step explanation:

here is the explanation

considering L.H.S

(9xy+1xy)(9xy-1xy)

(10xy)(8xy) = 80xy

hence L.H.S= R.H.S

it is true

hope it helps you