Question

Can someone help me ASAP???!!

Answer 1

25x² - 49y²

Explanation:

To Find:

The product of (5x - 7y)(5 x + 7)

How to solve:

Just need to use the formula of a² - b² = (a+b)(a-b)

let's assume a = 5x and b = 7x

Solution:

(5x - 7y)(5 x + 7) = (5x)² - (7y)²

= 25x² - 49y²

Hence required answer is 25x² - 49y².

Answer 2

25x ²−49y ²

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)

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