Add a constant to complete the square:
x
2
+
11
x
+
\displaystyle {x}^{{2}}+{11}{x}+
x
2
+
11
x
+
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\displaystyle
Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Enter DNE for Does Not Exist, oo for Infinity