Factorise :

4(2x - 3y)² - 8x + 12y - 3

Factorise :

3 - 5x + 5y - 12(x - y)²

L.C.M. of x² + 3x + 2 and x² - 2x - 3 in simplest form is:

1. (x + 1)²(x + 2)(x + 3)

2. (x² + 3x + 2)(x² - 2x - 3)

3. (x + 1)(x + 2)(x - 3)

4. none of these

H.C.F of x² + 3x + 2 and x² - 2x - 3 is :

1. (x + 1)

2. (x + 1)(x + 2)(x - 3)

3. 1

4. none of these