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20 November, 12:31

If f (x) = x^2+3x+5, what is f (3+h)

A. (x^2+3x+5) (3+h)

B. h^2+9h+23

C. (3+h) ^2+8+h

D. h^2+h+23

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Answers (1)
  1. 20 November, 12:56
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    F (x) = x^2 + 3x + 5. For f (3+h), put x = 3+h. F (3+h) = (3+h) ^2 + 3 (3+h) + 5 = 9 + h^2 + 6h + 9 + 3h + 5 = h^2 + 9h + 23. B is the correct option.
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