S Purkayastha Solutions for Chapter: Factorisation, Exercise 4: CHECK POINT

Factorise the following:

$9c^2-a^2-4b^2+4ab$

Factorise the following:

${\left(x+y\right)}^2-{\left(x-y\right)}^2$

Factorise the following:

$36x^2-25{\left(y-z\right)}^2$

Factorise the following:

$x^2+8x+15$

Factorise the following:

$a^2+b^2+2ab-c^2-d^2-2cd$

Factorise the following:

$36x^2-{\left(3p-1\right)}^2$

Factorise the following:

$x^4+x^2+1$

Factorise the following:

$x{y}^9-y{x}^9$