asked 174k views
2 votes
Rob is asked to simplify the expression below.

10x-2(4x+6y)+3y

He states that the simplified expression is 2x+15y because using the Distributive Property yields 10x-8x+12y+3y, and then combining like terms yields 2x+15y.

Explain the error in Rob' s reasoning.

Write the correct simplified expression for 10x-2(4x+6y)+3y. Show your work.

1 Answer

5 votes
He forgot to change ALL the sign inside the bracket.
It should read:
10x-8x-12y+3y=2x-9y
answered
User Champ
by
7.9k points
Welcome to Qamnty — a place to ask, share, and grow together. Join our community and get real answers from real people.