Erik made an error in his homework. He said that
3x + 12 + 4x2 - 3 is equivalent to 7x + 9.
What is the correct way for Erik to fix his error?
A) He should combine 12 and 3 to get 15.
B) He should combine 3x and 4x² to get 7x3.
C) He should not combine 3x and 4x?.
D) He should not combine 12 and 3.
