State the domain and range for the function f(x) = 2x2 – 7. show all steps, .

2x^2 - 7 

we can plug any values of x into this The domain is All Real x.

The graph will be a parabola opening upwards with a minimum value  when x = 0  and  f(x) will be = -7

so the range is  f(x) <= -7    or  (-∞, -7]

12+3b -1=-5-b -12-1+5=-b-3b -8=-4b