Question

Please solve this question.....​

Answer 1

Answer:

B

Step-by-step explanation:

roots lie between -2 qnd 4

so, f(-2)>0 &f(4)>0

f(-2)=m^2+4m+3>0

(m+3)(m+1)>0

-inf<m<-3 and -1<m<inf

f(4)>0

m^2-8m+15>0

(m-5)(m-3)>0

-inf<m<3 and 5<m<inf

one more condition

-2<-b/2a<4

-2<2m/2<4

-2<m<4

intersection of all values

-1<m<3