2. 外语
  3. For the function f(x)=x2+x, what is the value of f(-5)?

For the function f(x)=x2+x, what is the value of f(-5)?

admin2011-03-08  19
问题 For the function f(x)=x2+x, what is the value of f(-5)?
选项
答案 To solve, substitute -5 for x in the function: f(-5)=(-5) 2+(-5) f(-5)=25-5 f(-5)=20
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