(2x-1)²=(1+根号二)² 25x²-10x+1=9 (x+根号五)(x-根号五)=20 (x-5)(2x-1)²=(1+根号二)² 25x²-10x+1=9 (x+根号五)(x-根号五)=20 (x-5)(x+3)+(x-2)(x+4)=75 x²-4mx+4m²=n²
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/19 09:32:12
![(2x-1)²=(1+根号二)² 25x²-10x+1=9 (x+根号五)(x-根号五)=20 (x-5)(2x-1)²=(1+根号二)² 25x²-10x+1=9 (x+根号五)(x-根号五)=20 (x-5)(x+3)+(x-2)(x+4)=75 x²-4mx+4m²=n²](/uploads/image/z/11463572-20-2.jpg?t=%282x-1%29%26%23178%3B%3D%EF%BC%881%2B%E6%A0%B9%E5%8F%B7%E4%BA%8C%EF%BC%89%26%23178%3B+25x%26%23178%3B-10x%2B1%3D9+%EF%BC%88x%2B%E6%A0%B9%E5%8F%B7%E4%BA%94%EF%BC%89%EF%BC%88x-%E6%A0%B9%E5%8F%B7%E4%BA%94%EF%BC%89%3D20+%EF%BC%88x-5%29%282x-1%29%26%23178%3B%3D%EF%BC%881%2B%E6%A0%B9%E5%8F%B7%E4%BA%8C%EF%BC%89%26%23178%3B+25x%26%23178%3B-10x%2B1%3D9+%EF%BC%88x%2B%E6%A0%B9%E5%8F%B7%E4%BA%94%EF%BC%89%EF%BC%88x-%E6%A0%B9%E5%8F%B7%E4%BA%94%EF%BC%89%3D20+%EF%BC%88x-5%29%EF%BC%88x%2B3%29%2B%28x-2%29%28x%2B4%29%3D75+x%26%23178%3B-4mx%2B4m%26%23178%3B%3Dn%26%23178%3B)
x)05TS64}PقO?~O'D\ȴ546T T E52 5դ`ƚF&
0#Mr"PAh"}xn//~cճi;/MD8
F
CG 1]am7DXDY4]#}S Q^hm&`kd
5FKb[P6gSa3T*KU(fr5HāA
4@ Gh
(2x-1)²=(1+根号二)² 25x²-10x+1=9 (x+根号五)(x-根号五)=20 (x-5)(2x-1)²=(1+根号二)² 25x²-10x+1=9 (x+根号五)(x-根号五)=20 (x-5)(x+3)+(x-2)(x+4)=75 x²-4mx+4m²=n²
(2x-1)²=(1+根号二)² 25x²-10x+1=9 (x+根号五)(x-根号五)=20 (x-5)
(2x-1)²=(1+根号二)² 25x²-10x+1=9 (x+根号五)(x-根号五)=20 (x-5)(x+3)+(x-2)(x+4)=75 x²-4mx+4m²=n²
解个方程
(2x-1)²=(1+根号二)² 25x²-10x+1=9 (x+根号五)(x-根号五)=20 (x-5)(2x-1)²=(1+根号二)² 25x²-10x+1=9 (x+根号五)(x-根号五)=20 (x-5)(x+3)+(x-2)(x+4)=75 x²-4mx+4m²=n²
(2x-1)²=(1+根号二)²
2x-1=±(1+√2)
x=[1±(1+√2)]/2
25x²-10x+1=9
5x-1=±3
x=4/5或-2/5
(x+根号五)(x-根号五)=20
x²-5=20
x²=25
x=±5
(x-5)(x+3)+(x-2)(x+4)=75
x²-2x-15+x²+2x-8=75
2x²=75+23
x²=49
x=±7
x²-4mx+4m²=n²
(x-2m)²=n²
x-2m=±n
x=2m±n