maru91
02.07.2019 •
Mathematics
The trinomial x2 + bx + c factors to (x + m)(x + n). if b is negative and c is positive, what must be true about m and n? m and n are both positive. m is positive and n is negative. m is negative and n is positive. m and n are both negative.
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Ответ:
if we compare
a=1
b=m+n
c=mn
if b is negative and c is positive then
m+n<0 and mn>0
let's look at the 2nd one
mn>0
that means either m and n are both positive or both negative
look at the other one
m+n<0
if they are both positive, this is false
if they are both negative, this is true
therefor m and n are both negative
Ответ:
D) m and n should be negative
Step-by-step explanation:
Ответ:
umm
Step-by-step explanation: