A) +10
B) 10

A) Expression
B) expression

A) equation
B) Equation

A) +4
B) 4

A) True
B) False

A) 4ba
B) 5b²a
C) 3ab
D) ab

A) the same number of letters
B) the same group of letters which have the same powers
C) the same group of letters in the same order only

A) -7y²x
B) -5x²y
C) xy²
D) 3xy²

A) 2a²bc³
B) -4ba²c³
C) 2ab³c³
D) 5a²c³b
E) 2abc