Answer:
Part A:
(2x+7)(5x+9)
(2x*5x)+(2x*9)+(7*5x)+(7*9)
10x^2+18x+35x+63
10x^2+53x+63
Part B:
The polynomial has two terms, so is a binomial; also, the polynomial only has one variable, x, and the largest exponent of that variable is 2; therefore is a degree 2 polynomial. In summary, we have a binomial of degree 2.
Part C: Part A demonstrates the closure property for polynomials because after multiplying the polynomials we obtained another polynomial.
Step-by-step explanation:
