Question

Which statement shows how the product of (x + 5)2 demonstrates the closure property of multiplication?

x2 + 25 is a polynomial
x2 + 25 may or may not be a polynomial
x2 + 10x + 25 is a polynomial
x2 + 10x + 25 may or may not be a polynomial

Answer 1

C

Explanation:

I took the test

Answer 2

x2+10x+25 is a polynomial

Explanation:

The closure property means the product of two poly should be a poly. That's the case.

(x+5)2 = (x+5) (x+5) = x2+5x+5x+25 = x2+10x+25

This final result is a poly, and the sentence which this poly is written is the third one.