Factorize each of the following expressions:
(i) `a^2x^2+(a x^2+1)x+a`,
(ii)`3a x-6a y-8b y+4b x`

Explanation

Given:

` (i) a^2x^2+(a x^2+1)x+a`

`=> a^2x^2+a x^3+x+a`

`=> ax^2(a+x)+(x+a)`

`=>(ax^2+1)(a+x)`


`(ii) 3a x-6a y-8b y+4b x`

`=> 3a(x-2y)+4b(-2y+x)`

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