okay here is some of the questions i couldn't do
factorize the following fully
a) 8(m^2)+4m+2
b) (x^2)-3xy-4(y^2)-6x-6y
c) (x^3)-4(x^2)-12x-(x^2)y+36y
d) (x^2)-9(y^2)-3xz-9yz
b) $\displaystyle x^2 - 3xy - 4y^2 - 6x -6y = (x - 4y)(x+y) - 6(x+y)$
$\displaystyle = (x+y)(x - 4y - 6)$
c) $\displaystyle x^3 - 4x^2 - 12x - x^2y + 36y = x(x^2 - 4x -12) - y(x^2 - 36)$
$\displaystyle =x(x-6)(x+2) -y(x-6)(x+6)$
$\displaystyle = (x-6)[x(x+2) -y(x+6)] $
d) $\displaystyle x^2 - 9y^2 - 3xz - 9yz = (x+3y)(x-3y) - 3z(x+3y)$
$\displaystyle = (x+3y)(x - 3y - 3z)$.