Perhatikan gambar di bawah ini! (i)12x²-14x=2x(6x-7) (ii)6x²+x-21=(3x+7)(2x-3) (iii)2x²-5x-25=(2x+5)(x-5) (iv)10x²-41x+27=(2x-9)(5x-3) Pertanyaan yang benar ada

[tex](i) {12x}^{2} - 14x = 2x(6x - 7) \\ {12x}^{2} - 14x = {12x}^{2} - 14x \\ (benar) \\ (ii) {6x}^{2} + x - 21 = (3x + 7)(2x - 3) \\ {6x}^{2} + x - 21 = {6x}^{2} - 9x + 14x - 21 \\ {6x}^{2} + x - 21 = {6x}^{2} + 5x - 21 \\ (salah) \\ (iii) {2x}^{2} - 5x - 25 = (2x + 5)(x - 5) \\ {2x}^{2} - 5x - 25 = {2x}^{2} - 10x + 5x - 25 \\ {2x}^{2} - 5x - 25 = {2x}^{2} - 5x - 25 \\ (benar) \\ (iv) {10x}^{2} - 41x + 27 = (2x - 9)(5x - 3) \\ {10x}^{2} - 41x + 27 = {10x}^{2} - 6x - 45x + 27 \\ {10x}^{2} - 41x + 27 = {10x}^{2} - 51x + 27 \\ (salah)[/tex]
Jadi, yang benar adalah (i) dan (iii)