Given that f(x) = x² + 4x, evaluate f(-2).
(-2)^2 + 4(-2) = 4 - 8 = -4
To evaluate f(-2), we substitute -2 into the function f(x) = x² + 4x.
f(-2) = (-2)² + 4(-2)
Now, we calculate the value:
f(-2) = 4 + (-8)
Simplifying further:
f(-2) = -4
To evaluate the function f(x) = x² + 4x at a specific value, simply substitute that value into the function and perform the necessary calculations.
In this case, we need to evaluate f(-2). So, we substitute -2 for x in the function:
f(-2) = (-2)² + 4(-2)
Now, let's simplify this expression:
f(-2) = 4 + (-8)
Simplifying further:
f(-2) = -4
Therefore, when we evaluate f(-2), the result is -4.