Question

cat face (m+1)(m+2)+6.(-1)

Answer 1

(m+1)(m+2)+6 ori (-1)=
(m patrat +2m+m+2)-6
m patrat+3m+2-6=> m patrat +3m -4=0
rezolvam cu delta. 
a=1 b=3 c=-4
delta= b patrat -4ac= 9+16=25
x1,2= -b+- radical din delta / 2a ===> x1=-3+5/2=>x1=1
x2=-3-5/2=> x2= -8/2= -4  
=====> {1; -4}