Question 249811
What would be the indicated output for f(x)=5x2squared-2x?
f(0)=?
f(-1)=?
f(2)=?
can someone help me please?

To find the value of the function f for a specific value of x you substitute that value for x in the expression that defines the function:

In this case:

f(x) = 5*(x^2) - 2*x

So: 

f(0) = 5*(0^2) - 2*0
     = 0 - 0 = 0

f(-1) = 5*(-1)^2 - 2*(-1)
      = 5*1 + 2
      = 5 + 2 = 7

What then is f(2)?