Answer:
C) -12
Step-by-step explanation:
[tex]2x^2+24x+40=0[/tex]
[tex]\frac{2x^2+24x+40}{2} =\frac{0}{2}[/tex]
[tex]x^2+12x+20=0[/tex]
[tex](x+10)(x+2)=0[/tex]
[tex]x=-10, x=-2[/tex]
[tex]-10+(-2)=-12[/tex]
Sum of solutions=-12
