SOLUTION: is 4x(3+x) quadratic?

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Question 562125: is 4x(3+x) quadratic?
Answer by KMST(5328) About Me  (Show Source):
You can put this solution on YOUR website!
f%28x%29=4x%283%2Bx%29=4x%5E2%2B12x can be called a quadratic function.
4x%283%2Bx%29=4x%5E2%2B12x can be called a quadratic trinomial or a quadratic polynomial. The fact that there is an x%5E2 in it makes quadratic.