Can someone please help me find the area?

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

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g

The average daily maximum temperature for laura’s hometown can be modeled by the function f(x)=4.5sin(πx/6)+11.8 , where f(x) is the temperature in °c and x is the month. x = 0 corresponds to january. what is the average daily maximum temperature in may? round to the nearest tenth of a degree if needed. use 3.14 for π .