Explanation:

11m²+120m= 11
11m² +121m-m-11=0
11m(m +11) -1(m +11)=0
(m+11) ( 11m-1)=0
m=- 11 , 1/11
8n²+74n+143=0
8n² +22n+52n+143 =
2n( 4n+11) +13(4n+11)=0
(4n+11) ( 2n+13)=0
n= -11/4, -13/2
Hence the relation cannot be determined