Mathematics for IGCSE & O level - Functions (Section 1 - No. 37) | ExamPlay

Mathematics for IGCSE & O level - Functions (Section 1 - No. 37)

Given f(x) = x^2 - 4 and g(x) = x+2, find f(g(x)).

x^2-2

x^2+4x

x^2+4x+4

x^2+4x-4

Explanation

f(g(x)) = f(x+2) = (x+2)^2 -4 = x^2+4x+4-4 = x^2+4x

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