if g(x) = 2x^2 + 7x - 4, find g(-2)

Answer:
g(-2) = -10
Step-by-step explanation:
Here we're "evaluating g(-2)," that is, finding the value of the function g(x) when x = -2.
Substitute -2 for each instance of x in g(x) = 2x^2 + 7x - 4:
g(-2) = 2(-2)^2 + 7(-2) - 4 (be sure to use parentheses around -2)
or g(-2) = 2(4) - 14 - 4, or:
g(-2) = -10