Question

Factorise 81 x square - y square

Answer 1

Answer:

Factor 81x²−y²

81x²−y²

=(9x+y)(9x−y)

Answer:

(9x+y)(9x−y)

Answer 2

Answer:

Step-by-step explanation:

81x^2 - y^2

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

=(9x-y)(9x+y). [ Applying identity a^2 -b^2 = (a-b)(a+b)