写出方程x²-2x-4=0的近似解,精确到0.1
问题描述:
写出方程x²-2x-4=0的近似解,精确到0.1
答
x²-2x-4=0
(x-1)²=3
x-1=1.732或-1.732
x=2.732或-0.732
精确到0.1后,得
x=2.7或-0.7