Which represents a quadratic function?
o f(x) = 2x3 + 2x2 - 4
of(x) = -7x2 - x + 2
f(x) = -3x + 2
u f(x) = 0x2 + 3x - 3

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?