Answer:
a. Ans;
[tex](2y - 1)(3y + 5) \\ 6 {y}^{2} + 10y - 3y - 5 \\ 6 {y}^{2} + 7y - 5[/tex]
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b. Ans;
[tex](2y - 3)^{2} \\ (2y - 3)(2y - 3) \\ 4 {y}^{2} - 6y - 6y + 9 \\ 4 {y}^{2} - 12y + 9[/tex]
___o___o___
c. Ans;
[tex](x + 2)(x + y - 2) \\ {x}^{2} + xy - 2x + 2x + 2y - 4 \\ {x}^{2} + xy + 2y - 4[/tex]
I hope I helped you^_^
