Let f(x) = 2x + 4 and g(x) = 4x^2+ 2x. After simplifying, (fg)(x) = ?

Step-by-step explanation:

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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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if you was gonna solve for a, a is a   < -12