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Ответ:

[tex] \\ 2)a(b - c) = ab - ac[/tex]

[tex]3)6x + 18 = 6(x + 3)[/tex]

[tex]4)(4 {p}^{2} - p) + (5p - 7) - ( {p}^{2} - 7) = 4 {p}^{2} - p + 5p - 7 - {p}^{2} + 7 =3 {p}^{2} + 4p[/tex]

[tex]5) \\ a)8 {a}^{2} - 12ab = 4a \times (2a - 3b) \\ b)7m - 7n + xm - xn = 7m - 7n + mx - nx[/tex]

[tex]6)(x + 7)(x - 2) - x(x + 5) = {x}^{2} - 2x + 7x - 14 - {x}^{2} - 5x = 0 - 14 = - 14[/tex]

[tex]7)xy + 7x - 7y - {x}^{2} = y \times (x - 7) - x \times ( - 7 + x) = (x + 7) \times (y + x)[/tex]