解方程:(3X-1)(X+2)=11X-4
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/05 20:15:45
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解方程:(3X-1)(X+2)=11X-4
解方程:(3X-1)(X+2)=11X-4
解方程:(3X-1)(X+2)=11X-4
(3X-1)(X+2)=11X-4
3X²+5X-2=11X-4
3X²+5X-2-11X+4=0
3X²-6X+2=0
∵a=3 ,b=-6 ,c=2
b²-4ac=(-6)²-4×3×2
=36-24
=12
∴X=[-(-6)±√12]/(2×3)
=(6±2√3)/6
X1=(3+√3)3,X2=(3-√3)/3
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