Question

A rectangle has sides measuring (3x + 2) units and (5x + 8) units.

Part A: What is the expression that represents the area of the rectangle? Show your work to receive
full credit. (4 points)
Part B: What are the degree and classification of the expression obtained in Part A? (3 points)
Part C: How does Part A demonstrate the closure property for polynomials? (3 points)

Answer 1

A:

(4x+5)(3x+10)=

(12x^2) + (40x) + (15x) + (50)

12x^2 + 55x + 50

B: 2nd degree trinomial.

C: it is demonstrated in part A because when we added it, the variable do not change and neither do the exponents.

Explanation:

do not copy. used this on my test.