Question

Factorise the following -

Answer 1

512x sq y sq -72

8(64xsq ysq -9)

Answer 2

512x^2y^2 - 72
(Take 8 as common)
8(64x^2y^2 - 9)
8((8xy)^2 - (3)^2)
Answer: 8(8xy+3)(8xy-3)