How is this problem done?
IF f(x)=2x^2-8x-3 FIND f(-2)
Put in for x the value -2, and compute f(-2)
so is the answer f=21/2? if that is right, thank you bobpursley
To find the value of f(-2), you need to substitute -2 into the expression for f(x) and then simplify the equation.
Start with the given expression for f(x):
f(x) = 2x^2 - 8x - 3
Now, substitute -2 for x in the expression:
f(-2) = 2(-2)^2 - 8(-2) - 3
Next, simplify the equation according to the order of operations:
f(-2) = 2(4) + 16 - 3
f(-2) = 8 + 16 - 3
f(-2) = 24 - 3
f(-2) = 21
Therefore, the value of f(-2) is 21.