Question

Using suitable identities to find the following products (3x-5y)(3x-5y)

Answer 1

Answer should be this..

Answer 2

Answer:

(3x-5y)(3x-5y)=(3x-5y) square

As per the identity ( a-b)square=a^2-2ab+b^2

3x^2-2(3x*5y)+5y^2

9x^2-30xy+25y^2