Question

Factorise : 1-18y-63y²​

Answer 1

Step-by-step explanation:

Answer:

(1 - 21y)(1 + 3y)

Step-by-step explanation:

1 - 18y - 63y²

= 1 + 3y - 21y - 63y²

= 1(1 + 3y) - 21y(1 + 3y)

= (1 - 21y)(1 + 3y)

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Answer 2

Answer:

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