Question

factorise: 9z²-x²-4xy-4y²​

Answer 1

Answer:

9z²-(x²-4xy+4y²)

9z²-{(x)²-2x2y+(2y)²}

9z²-(x-y)²

(3z)²-(x-y)²

(3z+x-y)(3z-x+y)

Step-by-step explanation:

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Answer 2

Answer:

(3z+x-y) (3z-x+y)

hope it helps u

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