(1) X²-5X+3 (2)X²-2√2x-3(3)3X²+4XY-Y² (4)(X²-2X)²-7(X²-2X)+12
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/22 00:53:13
![(1) X²-5X+3 (2)X²-2√2x-3(3)3X²+4XY-Y² (4)(X²-2X)²-7(X²-2X)+12](/uploads/image/z/1644734-38-4.jpg?t=%281%29+X%26%23178%3B-5X%2B3+%282%29X%26%23178%3B-2%E2%88%9A2x-3%EF%BC%883%EF%BC%893X%26%23178%3B%2B4XY-Y%26%23178%3B+%EF%BC%884%EF%BC%89%EF%BC%88X%26%23178%3B-2X%EF%BC%89%26%23178%3B-7%EF%BC%88X%26%23178%3B-2X%EF%BC%89%2B12)
(1) X²-5X+3 (2)X²-2√2x-3(3)3X²+4XY-Y² (4)(X²-2X)²-7(X²-2X)+12
(1) X²-5X+3 (2)X²-2√2x-3
(3)3X²+4XY-Y² (4)(X²-2X)²-7(X²-2X)+12
(1) X²-5X+3 (2)X²-2√2x-3(3)3X²+4XY-Y² (4)(X²-2X)²-7(X²-2X)+12
对于二次三项式分解因式,皆可用方程法,其他的与此同,当然也可用其他法,在你想不出其他法时,方程法就是最佳方法(折项法、裂项法、添项法,分组法,需要一定的技巧),令 X²-5X+3 =0,设解得的两根分别为x1,x2,则 X²-5X+3 =(x-x1)(x-x2)
(1)[x-(5-√13)/2][x-(5+√13)/2]