+273 The function f ( x ) is defined by f ( x ) = x ^ 2 - x . What is the value of f ( 4 )?
+32 Basically functions are simple once you find the secret, and the secret is basically just plugging in 4 as the value of x. So, this... f(x)=x^2-x would look more like this... f(4)=4^2-4 and you can simplify the equation to this... f(4)=16-4 and the answer is now obvious: 12
