Question

A student submitted the following work. Is it correct? If not, what is the mistake?

A) The work is correct.

B) The answer is wrong because the student did not distribute correctly.

C) The answer is wrong because the student did not combine like terms correctly.

D) The answer is wrong because the student did not multiply positive and negative numbers correctly.

Answer 1

Answer: B!!! i just did it on edg.

Explanation:

Answer 2

C) The answer is wrong because the student did not combine like terms correctly.

Explanation:

The like terms -9x and +7x come together to make -2x, not +2x