A2-column table with 8 rows. the first column is labeled x with entries negative 8, negative 6, negative 4, negative 2, 0, 2, 4, 6. the second column is labeled f of x with entries negative 16, negative 8, 0, 8, 16, 32, 64, 128. which could be the entire interval over which the function, f(x), is negative? (–8, –2) (–8, 0) (–∞, –6) (–∞, –4)

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answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

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mrb

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