Factorise

$y^2+5y+6$

Factorise

$x^2+2x-15$

Factorise

$a^2-7a+12$

Factorise

$z^2+9z+20$

Factorise

$x^2-6x+8$

Factorise

$p^2+p-12$

Divide the below monomials:

$12x^3{y}^{2 } by 3x{y}^2$

Divide the below monomials:

$8a^3 by 2a$

Divide the below monomials:

$-27a^{3}b by 9ab$