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23-02-2021
Mathematics

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2. Factorise : (i) 9x² + y² + 64 - 6xy +16y - 48x

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Аноним Аноним

23-02-2021

Answer:

9x² + y² + 64 - 6xy - 16y - 48x

= 9x² - 6xy - 48x + y² - 16y + 64

= 9x² - 6x(y - 8) + y² - 2.8y + 8²

= (3x)² - 6x(y - 8) + (y - 8)²

= [3x - (y - 8)]²

= (3x - y + 8)²

Step-by-step explanation:

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