Math, asked by dirtlight6, 4 months ago

Factorise using identity - : 81 x square - 4 y square

Answers

Answered by rimimajhi

1

Answer:

we know that-

( a+b) ( a- b) = a^2 -b^2

= ( 9x)^2 - (2y ) ^2

=(9x +2y) ( 9x - 2y)

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