Question

Elio and Denise solved the equation, (-3n-8)(2n+4)=0. Their work is shown below.

Answer 1

Answer:

Elio's answer is correct.

Step-by-step explanation:

Because a positive number becomes negative at the other side of the 'equal(=)' sign. Denise kept it positive which is wrong.

*2n+4=0 is to be seen.  

Answer 2

Answer:

Elio is correct.

Step-by-step explanation:

Only Elio is correct; he used the Zero Product Property correctly for both factors. For $-3n-8=0$, he correctly got $n=-\frac{8}{3}$. For $2n+4=0$, he remembered to subtract $4$ from both sides to get $2n=-4$, which yields $n=-2$ as the other solution.