100乘以x-0.6666乘以x的2次方=28.19请问应该等于多少?公式是怎么样计算的?请尽量简单

发布时间：2021-03-16 10:23:08

100乘以x-0.6666乘以x的2次方=28.19请问应该等于多少?公式是怎么样计算的?请尽量简单一些!

网友回答

对于ax^2+bx+c=0
x1,2=(-b±√(b^2-4ac))/2a
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