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natali 33 [55]
4 years ago
10

Can someone help me ASAP???!!

Mathematics
2 answers:
VARVARA [1.3K]4 years ago
4 0

25x² - 49y²

Step-by-step explanation:

<u>To Find</u>:

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

<u>H</u><u>ow to solve</u>:

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

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

<u>Solution</u>:

(5x - 7y)(5 x + 7) = (5x)² - (7y)²

= 25x² - 49y²

Hence required answer is 25x² - 49y².

amm18124 years ago
3 0

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)  

<em>let me know if it was helpful</em>

<em />

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