Mathematics for IGCSE & O level - Functions (Section 4 - No. 20)

Given that f(x) = 2x + 1 and g(x) = x^2, what is g(f(x))?

4x^2+4x+1

2x^2+1

4x^2+1

2x^2+4x+1

Explication

f(x) = 2x+1 and g(x) = (2x+1)^2

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