Factorize:
 
1. \(2x^2−2y+4xy−x\)
 
2. \(y^2+8zx−2xy−4yz\)
Answer variants:
\((2x+3)(x-2y)\)
\((y−2x)(y−4z)\)
\((y−x)(y−3z)\)
\((2x−1)(x+2y)\)