the vertex of this parabola is at 4,-3 when the x value is 5 the y value is -6 what's the coefficent of the squared expression in the probalas equation A-2 b2 c3 d-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?