Question

Factorise x^2-4y^2-12y-9

Answer 1

Answer:

(X+2y+3) * (x-2y-3)

Step-by-step explanation:

x^2-4y^2-12y-9

=x^2 - (4y^2 + 12y + 9)

= x^2 - {(2y)^2 + 2*2y*3 + (3)^2}

=(X)^2 - (2y + 3)^2

=(X+2y+3) * (x-2y-3)

hope this can help you......