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Which expression equals f(g(x)) when f(x) = x^2 and g(x) = x + 1?
Ax^2 + x
B2x + 1
Cx^2 + 2x + 1
Dx^2 + 1
Answer & Solution
Correct answer: C. x^2 + 2x + 1
Squaring x + 1 gives x^2 + 2x + 1.
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