Dose anyone know questions 2 and 3?

What number produces an irrational number when multiplied by -1.25

Explain why the function is discontinuous at the given number a. (select all that apply.) f(x) = 1 x + 1 a = −1 f(−1) is undefined. lim x→−1+ f(x) and lim x→−1− f(x) exist, but are not equal. lim x→−1 f(x) does not exist. f(−1) and lim x→−1 f(x) exist, but are not equal. none of the above

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12