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.)
来源:学生作业学帮网 编辑:学帮网 时间:2024/05/15 02:59:04
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.)
c/a<0
m*n<0 ==>
x1(2)=(1/2a)(-b+(-)(b^2-4ac)^(1/2))==>
x1*x2<0==>4ac<0==>ac<0
1.m<0, n>0 or m>0, n<0
2.mn<0
They are equivalent.
Note: c/a=mn.(Viète's formulas)
So...iff. c/a<0,then m<0, n>0 or m>0, n<0.
P.S."c/a<0" & "ac<0" are also equivalent.
show attention to=pay attention to
pay attention to a friendship什么意思
pay attention to同义词
pay attention to.翻译
pay attention to
pay attention to+?
Please pay attention to
pay a attention是什么意思
Pay attention to your chest,to spring a leak
pay attention to是什么意思?pay attention to的中文是什么?
pay more attention to 和pay much attention to区别,
When using a map,pay attention to the f___ things.
英语 翻译 pay attention(to)
pay attention to 的用法
pay attention to的用法
pay attention to的意思
pay attention to 怎么用?
pay attention to什么意思?