[" 1.Factorise: "(2x+3y)(5x-3y)],[-(x+y)(5x-3y)]

Factorise: 5a (2x -3y) + 2b (2x -3y)

Multiply: (2x+3y) (5x-y)

Factorise : (3x+5y)^3-(3x-5y)^3

Factorise (2x+3y)^(2)+14(2x+3y)(3x-y)-32(3x-y)^(2) .

Factorise (2x+3y)^(2)+14(2x+3y)(3x-y)-32(3x-y)^(2) .

Expand : (5x + 3y)(5x-3y)

Factorise : 3 - 5x + 5y - 12(x-y)^(2)

Find the sum of the following arithmetic progression: (x-y)/(x+y),(3x-2y)/(x+y),(5x-3y)/(x+y),\ ddotto\ n terms.

Find the sum of the following arithmetic progression: (x-y)/(x+y),(3x-2y)/(x+y),(5x-3y)/(x+y),quad longrightarrow n terms.