Question

factorise= x²-1-6y-9y²​

Answer 1

1(x ^2 -1) -3y (2- 3y) hope it will help you...

Answer 2

Hey mate here's ur ans!!!

x ^2-(1+6y+9y ^2)

= x^2 -[ (1) ^2+2× 1 × 3y + (3y)^2

= ( x )^2 -(1+3y)^2

= (x+1+3y)(x-1-3y)

hope this helps u please mark me as brainliest