What are the factors of 25x4 − 49y2?

The factors would be (5x²-7y)(5x²+7y).

Step-by-step explanation:

Since we have given that

We just need to factorise the above expression.

So, we can rewrite it as :

Here, we can apply "a^2-b^2=(a+b)(a-b)":

Here, a = 5x²

b = 7y

So, it becomes

Hence, the factors would be (5x²-7y)(5x²+7y).