Pre-Cal(Please help)

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Find two functions f and g such that (f X g)(x) = h(x). (There are many correct answers.)

h(x) = 4 / (5x + 2)^2 =

My answers were: f(x) = 4 / 5x, and
g(x) = 5x + 2

Please explain. These answers were wrong and I do not know how to fix them!!

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