x²+0.5x-0.78=0怎么解?

来源：学生作业帮助网编辑：六六作业网时间：2024/06/16 06:43:13

x²+0.5x-0.78=0怎么解?x²+0.5x-0.78=0怎么解?x²+0.5x-0.78=0怎么解?∵x²+0.5x-0.78=(x+0.25)^2-0

x²+0.5x-0.78=0怎么解?
x²+0.5x-0.78=0怎么解?

x²+0.5x-0.78=0怎么解?
∵x²+0.5x-0.78=(x+0.25)^2-0.8425=0∴(x+0.25)^2=0.8425,∴x≈0.9179-0.25=0.6679