Question

factorise 9x^2-6xy-y^2​

Answer 1

Answer:

(3x-y)(3x-y)

Step-by-step explanation:

9x²-6xy+y²

=(3x)²-2 X 3x X y +(y)²

=(3x-y)²

Answer 2

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9x²+6xy+y² = (3x)² + 2(3x)(y)+(y)²

Using identity I

= (3x+y)²=(3x+y)(3x+y)

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