Solve the equation
−
r
2
+
2
r
=
0
\displaystyle -{r}^{{2}}+{2}{r}={0}
−
r
2
+
2
r
=
0
.
If you have more than one solution, separate them with commas, as reduced fractions or integers.
r
=
\displaystyle {r}=
r
=
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\displaystyle
Enter your answer as a list of values separated by commas: Example: -4, 3, 2
Enter each value as a reduced fraction (like 5/3, not 10/6) or as an integer (like 4 or -2)
Do not enter mixed numbers
Enter DNE for Does Not Exist, oo for Infinity