Question

Multiply the polynomials (3x−1)(2x+4)
.

Answer 1

Which of the following responses shows that polynomials form a closed system under multiplication?(1 point)
Responses

3x24−1
Start Fraction 3 x squared over 4 minus 1 End Fraction

(x)(12x)
left parenthesis x right parenthesis left parenthesis Start Fraction 1 over 2 End Fraction x right parenthesis

6⋅−3
6 times negative 3

4x3⋅5

Answer 2

(3x-1)(2x+4) = 3x * 2x + 3x * 4 + (-1) * 2x + (-1) * 4
= 6x^2 + 12x - 2x + (-4)
= 6x^2 + 10x - 4

Answer 3

The correct response that shows that polynomials form a closed system under multiplication is:
4x3⋅5