Question

49x4 – 126x²y2 + 81y4 factorise ​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

49x⁴ - 126x²y² + 81y⁴

= (7x²)² - 2(7x²)(9y²)

[by using identity a² - 2ab + b² = (a + b)²]

= (7x² - 9y² )²