Question

用开平方的方法求x的值 x²=0.04 4（x-1）²=324 9x²-¼=0

Answer 1

x²=0.04

x=±√0.04

x=±0.2

x1=0.2

x2=-0.2

4(x-1)²=324

(x-1)²=324/4

(x-1)²=81

x-1=±√81

x-1=±9

x-1=9 或 x-1=-9

x1=10

x2=-8

9x²-¼=0

9x²=¼

x²=¼÷9

x²=1/36

x=±√(1/36)

x=±1/6

x1=1/6

x2=-1/6