Question

Find the product using identity (5x−7y) (5x+7y)

Answer 1

Answer:

$(5x - 7y)(5x + 7y)$

= 5x^2+35xy-35xy-49y^2

= 5x^2-49y^2

Answer 2

Answer:

25x  ²−49y ²

Step-by-step explanation:

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

By using identity (a+b)(a−b)=a −b  ²

 

We have a=5x,b=7y

Thus (5x+7y)(5x−7y)=(5x)  ²−(7y)  ²

 

=25x  ²−49y ²