7) 3x(x + 5) – 2x – 10 = 0 8) x – 3 + 3x(x – 3) = 0 9) 3x – 2 + 2x(3x – 2) = 0 10) x 2 – 1 + 2(x + 1) = 0 11) x 2 – 4 + 3x(x – 2) = 0 12) x(x + 2) + 2 = –x 13) 4 + 2x(2x + 4) = –x 14) 3x(x – 3) = –x + 3

Các câu hỏi liên quan