5x²-3x-5=0 则 5x²-2x-[1÷(5x²-2x-5)]15x²-3x-5=0 则 5x²-2x- -----------=?5x²-2x-5

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/30 04:16:06
5x²-3x-5=0 则 5x²-2x-[1÷(5x²-2x-5)]15x²-3x-5=0 则 5x²-2x- -----------=?5x²-2x-5

5x²-3x-5=0 则 5x²-2x-[1÷(5x²-2x-5)]15x²-3x-5=0 则 5x²-2x- -----------=?5x²-2x-5
5x²-3x-5=0 则 5x²-2x-[1÷(5x²-2x-5)]
1
5x²-3x-5=0 则 5x²-2x- -----------=?
5x²-2x-5

5x²-3x-5=0 则 5x²-2x-[1÷(5x²-2x-5)]15x²-3x-5=0 则 5x²-2x- -----------=?5x²-2x-5
5x²-2x=x+5,5x²-2x-5=x ,5x²-5=3x,即x²-1=3x/5.所以未知可以化简为:x+5-1/x=(x²+5x-1)/x=(3x/5+5x)/x=28/5完毕,要加分哦