Explain and correct the error made by a student who simplified this expression.

-2x - 4x + 8y - y

(-2 - 4) x + (8 - 0) y

-6x + 8y

Mistake: (8-0) y

Correction: (8-1) y

Step-by-step explanation:

Explanation:

if 8y/y = 8

then

y/y = 1

Factoring = division

Foiling = multiplication

Disclaimer:

I am human and may make mistakes. Always double check your work with a reliable source.