Answer:
D. 3x^2 + 3/2 x - 9
Step-by-step explanation:
(f+g)(x) = f(x) + g(x)
... = ((1/2)x -3) + (3x² +x -6) . . . . . substitute for f(x) and g(x)
... = 3x² +x(1/2 + 1) + (-3 -6) . . . . . combine like terms
... = 3x² +(3/2)x -9 . . . . . matches selection D
