Factorise the following using appropriate identity : 25x² - 20xy + 4y²
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Step-by-step explanation:
Given expression is 25x2−20xy+4y2
25x2−20xy+4y2
=25x2−10xy−10xy+4y2
=5x(5x−2y)−2y(5x−2y)
=(5x−2y)(5x−2y)
=(5x−2y)2
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