Question

Which of the following statements about the work shown below is true?

Answer 1

B is the correct answer on edge 2020 just took the test !

Explanation:

Answer 2

B). The distributive property was not applied correctly in the second step.

Explanation:

We need to find the correct option for marking error from given choices:

`\left(x^2+2x+6\right)\left(2x^2-4x-1\right)`

Step 1:

`x^2\left(2x^2-4x-1\right)+2x\left(2x^2-4x-1\right)+6\left(2x^2-4x-1\right)`

No error.

Step 2:

If you apply distributive property correctly then 2nd term gives:

`2x\left(2x^2-4x-1\right)=4x^3-8x^2-2x`

While 2nd term is not like that.

Hence final answer is :

B). The distributive property was not applied correctly in the second step.