evaluate the function at the given values of x, if possible. f(x)=7x^2-1 over x^2 a. x=3 b. x=-1
Can someone help me solve this

Question

anonymous · Answer

$$f(3)=\frac{7\times 3^2-1}{3^2}=\frac{7\times 9-1}{9}=\frac{63-1}{9}=\frac{62}{9}$$

anonymous · Answer

so that is the first one

anonymous · Answer

yes. for the second one replace x by -1
still need help or you got it?

anonymous · Answer

no still need help. i dont even know where to begin

anonymous · Answer

:(

anonymous · Answer

where you see an x, put in the number

anonymous · Answer

replace it.  so for example of 
$$f(x)=x^2$$ then 
$$f(3)=3^2$$and if 
$$f(x)=\frac{x-1}{x}$$ then 
$$f(3)=\frac{3-1}{3}$$

anonymous · Answer

in your case 
$$f(x)=\frac{7x^2-1}{x^2}$$ so 
$$f(-1)=\frac{7\times (-1)^2-1}{(-1)^2}=\frac{7\times 1-1}{1}=7-1=6$$

anonymous · Answer

OMG! This is such jiberish

anonymous · Answer

Thanks