Question 1095295
a) The degree is 4 since the leading term is x^4.
b) The function is even if f(x) = f(-x).  
Since both terms have even exponents, f(-x) is equal to f(x), so the function is even.
c) For large x, or large negative x, f(x) ~ x^4, so the function grows without bounds, i.e. f(x) -> infinity
d) x^4 - 9x^2 -> x^2(x^2 - 9) -> x^2(x+3)(x-3), so the zeros are 3, -3 (mult. 1) and 0 (mult. 2)
e) {{{graph(300, 200,-6,6,-20,40,x^4 - 9x^2)}}}