PLEASE HELP!!!!!!!!!!!!!
Number 1 was: The function f(x) is a difference of squares. Is exactly what its name says, you take 2 squared quantities like x² and z² or a square of a number like 36 or 25, then put a minus sign between them. So
f(x) = x² - 49 =factors to= (x-7)(x+7)
f(x) = 64 - x² =factors to= (8+x)(8-x)
f(x) = x² - k² =factors to= (x+k)(x-k)
4.Graph one of your 2nd degree functions from question 1. Identify which function you used and the key features of your graph. Explain how to find them algebraically.

Question

PLEASE HELP!!!!!!!!!!!!! 
Number 1 was: The function f(x) is a difference of squares. Is exactly what its name says, you take 2 squared quantities like x² and z² or a square of a number like 36 or 25, then put a minus sign between them. So
 f(x) = x² - 49 =factors to=> (x-7)(x+7) 
 f(x) = 64 - x² =factors to=> (8+x)(8-x) 
 f(x) = x² - k² =factors to=> (x+k)(x-k) 
 4.Graph one of your 2nd degree functions from question 1. Identify which function you used and the key features of your graph. Explain how to find them algebraically.