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Mathematics for IGCSE & O level - Functions (Section 3 - No. 2)

If g(x) = 3x + 5 and h(x) = x^2, what is (g(h(x))?
3x^2 + 5
(3x + 5)^2
3x^2 + 5x
9x^2 + 30x +25

Explanation

g(h(x)) = g(x^2) = 3(x^2)+ 5

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