Answer:
The correct option is C.
Step-by-step explanation:
The given expression is
[tex]x^2-22x[/tex] ....(1)
The perfect square is defined as
[tex](x-y)^2=x^2-2xy+y^2[/tex] ....(2)
On comparing (1) and (2) we get
[tex]2y=22[/tex]
[tex]y=11[/tex]
To making perfect square we have to add y² in the given expression.
[tex]y^2=(11)^2=121[/tex]
Therefore the correct option is C.
