factories 25x^2-49y^2 using identity a^2-b^2
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Step-by-step explanation:
Given expression is 25x²-49y²
It can be written as (5x)²-(7y)²
This is in the form of a²-b²
Here, a=5x and b=7y
we know that
a²-b²=(a+b)(a-b)
(5x)²-(7y)²=(5x+7y)(5x-7y)
25x²-49y²=(5x+7y)(5x-7y)
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