Who am iPart A: We know that the equation for finding the area of a triangle is ; we also know that and , so the only thing we need to do is replacing those values into our Area equation and solve for x:

Now the only thing left is factor the quadratic polynomial:

W can conclude that the area of our triangle is

Part B: Our polynomial has three terms, so is a trinomial; also, our polynoal only has one variable, , and the largest exponent of that variable is 2; therefore is a degree 2 polynomial. In summary, we have a trinomial of degree 2.

Part C: Part A demonstrate the closure property of polynomials because after multiplying tow polynomials we obtained another polynomial.
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