Question

Factorise 36(x+y)2-49(x-2y)2

Answer 1

please check attached

Answer 2

Step-by-step explanation:

= {6(x+y)}^2 -{7(x-2y)}^2 a^2-b^2= (a+b) (a-b)

= {6(x+y)+7(x-2y)} {6(x+y)-7(x-2y)}

=(6x+6y+7x-14y) (6x+6y-7x+14y)

=(13x-8y) (-x+20y)