Question

Find the product by using identity.
(4x2 + 5y2) (4x2 – 5y2)

Answer 1

Answer:

16x^4-25y^4

Step-by-step explanation:

So here we have got,

(4x^2+5y^2)(4x^2-5y^2)

So,

a=4x^2

b=5y^2

Then it represents the identity,

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

Thus,

the answer is

16x^4-25y^4