Pay attention to y=ax^2+bx+c(a≠0), and answer the question.If the two roots of this equation are m&n, which situation can be m0 orm>0, nNote: y=0 (I typed wrong.)
问题描述：
Pay attention to y=ax^2+bx+c(a≠0), and answer the question.
If the two roots of this equation are m&n, which situation can be m0
or
m>0, n
Note: y=0 (I typed wrong.)
答
1.m0 or m>0, n2.mnThey are equivalent.
Note: c/a=mn.(Viète's formulas)
So...iff. c/a0 or m>0, nP.S."c/a
答
m*n
x1(2)=(1/2a)(-b+(-)(b^2-4ac)^(1/2))==>
x1*x24acac
答
c/a＜0