3.5x*x=9.9解方程
3.5x*x=9.9解方程
数学人气:779 ℃时间:2020-04-26 06:48:22
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题目是3.5x²=9.是的话,九年级解法:3.5x²=9.9a=3.5,b=0,c=-9.9△=b²-4ac=0-4×3.5×﹙-9.9﹚=138.6>0方程有两个不等的实数根:x=﹙-b±√b²-4ac﹚/2a=﹙±√138.6﹚/7x₁=﹙√138.6﹚/7 x...
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