Question

3
solve the following
(5x-7y)³+(5x-7y)³
°​

Answer 1

Answer:

We need to find product of (5x+7)(5x−7y)

By using identity (a+b)(a−b)=a

2

−b

2

We have a=5x,b=7y

Thus (5x+7y)(5x−7y)=(5x)

2

−(7y)

2

=25x

2

−49y

2