(1)2x²-7x+3= (2)6x²-7x-5 (3)5x²+6xy-8y²
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/21 19:24:34
![(1)2x²-7x+3= (2)6x²-7x-5 (3)5x²+6xy-8y²](/uploads/image/z/1634938-34-8.jpg?t=%EF%BC%881%EF%BC%892x%26%23178%3B-7x%2B3%3D+%EF%BC%882%EF%BC%896x%26%23178%3B-7x-5+%EF%BC%883%EF%BC%895x%26%23178%3B%2B6xy-8y%26%23178%3B)
x){N
5eCsk]
mc[P!k
4
B**u-*!"}_`gC]XLQ53t!"O{|';g<<,faTkQk @jc H6P1PDn*@]alZkPHF 1,6`3XdwÓ/xg>* ءY
(1)2x²-7x+3= (2)6x²-7x-5 (3)5x²+6xy-8y²
(1)2x²-7x+3= (2)6x²-7x-5 (3)5x²+6xy-8y²
(1)2x²-7x+3= (2)6x²-7x-5 (3)5x²+6xy-8y²
解
2x²-7x+3
2 -1
1 -3
十字相乘法
=(2x-1)(x-3)
6x²-7x-5
2 1
3 -5
=(2x+1)(3x-5)
5x²+6xy-8y²
5 -4
1 2
=(5x-4)(x+2)
这是什么题?