Question 175173
1). Factor Out the GCF in this expression:
〖15x〗^2 y^2-〖9xy〗^2+〖6x〗^2 y 
2). Use grouping to factor each Polynomial completely:
x^3+ax+3a+〖3a〗^2 
3). Factor this polinomial. If it is prime, please tell me. 
18z + 45 + z^2 
the same with the next one:
4). 〖3x〗^3 y^2-〖3x〗^2 y^2+〖3xy〗^2
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your posting is very confusing.
Cheers,
Stan H.