pake caranya...tolong ya

nomor 10
(1) 2x² + 9x - 5 = (2x -1)(x + 5) = 2x² + 10x - x - 5 = 2x² + 9x - 5 (benar)
(2) 2x² - 5x - 3 = (2x - 1)(x+3) = 2x² + 6x - x - 3 = 2x² + 5x - 3 (salah)
(3) 4x² + 4x - 3 = (2x - 1)(2x + 3) = 4x² + 6x - 2x - 3 = 4x² + 4x - 3 (benar)
(4) 6x² + 7x - 3 = (2x + 3)(3x - 1) = 6x² - 2x + 9x - 3 = 6x² + 7x - 3 (benar)

jadi jawabannya C. (1), (3) dan (4)