Question 12246
{{{f(x) = x^2 - 5}}}


First find f(-3), which means to substitute the value of x=-3 into the given formula:

{{{f(x) = x^2 - 5}}}
{{{f(-3) = (-3)^2 - 5}}} = 9-5 = 4


Next, find 2f(-3) which just means to take f(-3) and multiply it times 2.
2f(-3) = 2*4 = 8


R^2 at SCC