Answer:
[f(-5)-f(-3)]/[-2]
Explanation:
I don't know your quadratic but all you need to do evaluate
[f(-5)-f(-3)] divided by [-5-(-3)]
simplifying the denominator:
[f(-5)-f(-3)] divided by -2
So you need to find f(-5), this means replace x with -5
f(-3) means to replace x with -3
After you find those two answers subtract what you got for the pluggin in of -3 from the pluggin in of -5
After that subtraction divide by -2