Question 1066660
x,x+2,x+4,and x+6
x^2+8x+12+16=-3(2x+4)
x^2+8x+28=-6x-12
x^2+14x+40=0
(x+10)(x+4)=0, as you got
-10,-8,-6,-4.
product of second and fourth is 32 and that is 16 fewer than -3(-16)=48
try
-4,-2,0,2
product of second and fourth is -4 and that is 16 fewer than -3(-4)=12
Two solutions you have above work.