Answer: The product is,
[tex]9x^2 - 49y^2[/tex]
Step-by-step explanation:
Here, the given expression is,
[tex](3x + 7y)(3x - 7y)[/tex]
We know that,
[tex](a+b)(a-b) = a^2 - b^2[/tex]
[tex]=(3x)^2 - (7y)^2[/tex]
[tex]=9x^2-49y^2[/tex]
Hence, the product of (3x + 7y)(3x - 7y) is [tex]9x^2-49y^2[/tex]
Third option is correct.
