Rút gọn

----- Nội dung ảnh -----
a) \( (3x + 5)(x - 6) = 0 \)
b) \( \frac{x}{x-2} - \frac{3}{x-3} = \frac{6-3x}{(x-3)(x-2)} \)
c) \( 2(x - 1) + 8 \ge 6(x + 5) \)