Math, asked by singhserena07, 2 months ago

Factorise 81 a²b²- 9 by explained

Answers

Answered by Anonymous

1

Answer:

(9ab+3)(9ab-3)

Step-by-step explanation:

81a²b²-9

= (9ab)²-(3)²

= (9ab+3)(9ab-3)

using formula x²-y² = (x+y)(x-y)

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