Answer:
[tex]4) \: a) \: 5xy \times (3x {}^{2} + 2xy + y {}^{2}) \\ \\ b) \: 2q \times (3p - 2) + 9p - 6 \\ 2q \times (3p - 2) + 3(3p - 2) \\ (3p - 2)(2q + 3) [/tex]
