D shows equivalent expressions
You should be able to note that this is a parabola which opens downward. Taking the derivative and setting it to -0- will yield the max of the equation, That is
⇒
⇒ 
(f.g)(x) = (4x + 6)(-5x) = -20x^2 -30x
ok done. Thank to me :>
Step-by-step explanation:
i think the answer is 10600