Factorize following expressions
(i) `a^2-4a+3+2b-b^2" (ii)"x^4-y^2+2x^2+1`

Factorize each of the following expressions: (i) 4a^2-9b^2-2a-3b (ii) x^2+2x y+y^2-a^2+2a b-b^2

Factorize following experssions (i) x^(4)-y^(4)" (ii)"9a^(2)-(2x-y)^(2)" (iii)"4x^(2)-9y^(2)-6x-9y

Factorize each of the following expressions : (i) x^4+2x^2+1

Factorize each of the following expressions: (a) a^2-b^2-a-b (b) 25 x^2-10 x+1-36 y^2 (c) 1-2a b-(a^2+b^2)

Factorize each of the following expressions: x a^2+x b^2-y a^2-y b^2 (2) x^2+x y a+x z+y z (3) 2a x+b x+2a y+b y (4) a b-b y-a y+y^2

Factorize each of the following expressions : x^4+y^4 (ii) x^4+4x^2+3

Factorize each of the following expressions: (i) 3-12(a-b)^2 (ii) x(x+z)-y(y+z)

Factorize each of the following expressions: 9x^2-4y^2 (ii) 36 x^2-12 x+1-25 y^2

Factorize each of the following expressions : x^4+x^2+1 (ii) x^4+5x^2+9

Factorize each of the following expressions: a^2-b+a b-a (ii) x y-a b+b x-a y