Question

Given f(x) = -x + 2f(x) = -x², find f(4).

Answer 1

To find f(4), substitute x=4 into the given function and simplify the expression.

Step-by-step explanation:

To find f(4), we need to substitute x = 4 into the given function f(x) = -x + 2f(x) = -x².

So, we have f(4) = -(4) + 2f(4) = -(4)².

Now, we can simplify this expression by evaluating f(4) in terms of f(4) itself.

f(4) = -4 + 2f(4) = -16.