Question

factorise the following expression​

Answer 1

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Answer 2

Solution :

p² -3pq +2q²

= p² - 2pq + q² + q² - pq

= ( p - q )² + q( q - p )

= ( p - q )² - q( p - q )

= ( p - q )[ p - q - q ]

= ( p - q )( p - 2q )

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