Question

求不等式解集

Answer 1

Answer 2

13-4m^2>0
4m^2-13<0
-√13/2<m<√13/2
解集 ={ m|-√13/2<m<√13/2}
m^2-3m-10>0
(m-2)(m+5)>0
m<-5 or m>2
解集 ={ m|m<-5 or m>2}
m(9-m)>0
m(m-9)<0
0<m<9
解集 ={ m|0<m<9}