题目

$15 x^{2} + 39 x + 24 =$ $15 x^{2} + 42 x + 24 =$ $15 x^{2} + 53 x + 24 =$ $15 x^{2} + 66 x + 24 =$ $15 x^{2} + 9 x - 24 =$ $15 x^{2} - 18 x - 24 =$ $15 x^{2} - 37 x - 24 =$ $15 x^{2} - 54 x - 24 =$ ——关联： 📝因式分解③十字相乘 ——链接：〚250927-2〛💯