Let f(x)=x²+2x+9. Find f(x+2), f(x+10). Find f(x+h) where h is any constant. Please slove this with steps.
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f(x+2)=x^2+2x+9+2
=x^2+2x+11
f(x+10)=x^2+2x+10+2
=x^2+2x+12
f(x+h) =x^2+2x+h+9
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