For how many values of $x$ is the function $y=\frac{x-2}{x^2-7x+10}$ not defined?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
For how many values of $x$ is the function $y=\frac{x-2}{x^2-7x+10}$ not defined?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
2
For how many values of $x$ is the function $y=\frac{x-2}{x^2-7x+10}$ not defined?
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