# math

posted by
**Allie**
.

Use Descarte's rule of signs to discuss the possibilities for the roots of the equation. Do not solve the equation

-5r^(4)+6r^(3)+9r-15=0

posted by
**Allie**
.

Use Descarte's rule of signs to discuss the possibilities for the roots of the equation. Do not solve the equation

-5r^(4)+6r^(3)+9r-15=0