SOLUTION: Find the indicated outputs for f(X)=3x(squared)-4x f(0)= I have tried this one about 4 times, can you walk me through it please on here so I know how to get the answer in the f

Algebra ->  Functions -> SOLUTION: Find the indicated outputs for f(X)=3x(squared)-4x f(0)= I have tried this one about 4 times, can you walk me through it please on here so I know how to get the answer in the f      Log On


   

Question 283267: Find the indicated outputs for f(X)=3x(squared)-4x
f(0)=
I have tried this one about 4 times, can you walk me through it please on here so I know how to get the answer in the future please!!!
Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
for all these f of x type problems, you are being asked to evaluate the expression at a given value of x.
So all you do is substitute in the given value of x everywhere in the given expression. The simplify and evaluate.
Given f%28x%29=3x%5E2-4x
Solve for f(0).
So sub in x=0 everywhere in the expression
f%280%29+=+3%2A0%5E2-4%2A0
f%280%29+=+0+-+0
f%280%29+=+0
If they then asked, what is f(2). do the same process
Given f%28x%29=3x%5E2-4x
Solve for f(2).
So sub in x=2 everywhere in the expression
f%282%29+=+3%2A2%5E2-4%2A2
f%282%29+=+3%2A4+-+8
f%282%29+=+12+-+8
f%282%29+=+4
make sense?
If yuou do that for a bunch of values for x, you get a bunch of points. Plot thos points and connect the dots to get a graph of the expression (a function in this case)
here is a graph
graph%28400%2C400%2C-10%2C10%2C-10%2C10%2C3x%5E2-4x%29