Factorise
2(x-2y)^2-50y^2
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Step-by-step explanation:
2(x-2y)² - 50y²
=2(x²-4xy+4y²)-50y²
=2x²-8xy-42y²
=> 2(x²-4xy-21y²)
Hope right. Since there is no RHS given I feel a little bit doubt. Please ignore if wrong.
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