Math, asked by dhruveel76, 6 months ago

factorise 81q²-16c²

Answers

Answered by harsh123456728

5

Answer:

81q²-16c²

the answer is option( 9q + 4c) ( 9q - 4c)

(a t b ) ( a - b) = ( a - b) ²

( 9q + 4c ) ( 9q - 4c) = ( 9q )² - ( 4c )²

= 81q² - 16c²

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