SOLUTION: given f(x)= x^2+3x find f(x^2)

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Question 455366: given f(x)= x^2+3x find f(x^2)
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
f%28x%5E2%29+=+%28x%5E2%29%5E2+%2B+3%2Ax%5E2+=+x%5E4+%2B+3x%5E2, by direct substitution.