MCQ
Coordinate planes divide the space into octants:
- A$4$
- B$6$
- ✓$8$
- D$10$
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$f(x)=x^2+a x+2 ; g(x)=x^2+2 x+a$.If the equations $f(x)=0$ and $g(x)=0$ have a common root, then the sum of the roots of the equation $f(x)+g(x)=0$ is