(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:六六作业网 时间:2024/08/26 02:44:50
(2x-1)²=(1+根号二)²25x²-10x+1=9(x+根号五)(x-根号五)=20(x-5)(2x-1)²=(1+根号二)²25x²
(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