Asked by June

D(x)=x^2+2x
h(x)=7

h(D)=
Answered by Reiny
As I noted before, I don't like your notation

Does h(D) mean h(D(x)) or (h◦D)(x) ?
Those are standard notation .

Answered by anon
I mean h(D(x)). Sorry about that. That's how my teacher wrote it.

would the answer be: 7^2+2(7) = 49+14 = 63?
Answered by Reiny
no, since h(x) = 7, it means no matter what you put in for x, the answer will be 7
so h(D(x)) = 7
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