Arunners Arunners

28-02-2017
Mathematics

Answered

Find the product of (3x + 7y)(3x − 7y).

9x2 − 42xy + 49y2

9x2 + 42xy + 49y2

9x2 − 49y2

9x2 + 49y2 ...?

Verified Answer :

Lik3abos5 Lik3abos5

01-03-2017

9x2-49y^2 is the answer

Answer Link

slicergiza slicergiza

15-07-2019

Answer: The product is,

\(9x^2 - 49y^2\)

Step-by-step explanation:

Here, the given expression is,

\((3x + 7y)(3x - 7y)\)

We know that,

\((a+b)(a-b) = a^2 - b^2\)

\(=(3x)^2 - (7y)^2\)

\(=9x^2-49y^2\)

Hence, the product of (3x + 7y)(3x - 7y) is \(9x^2-49y^2\)

Third option is correct.

Answer Link

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