A) 10
B) +10

A) Expression
B) expression

A) Equation
B) equation

A) 4
B) +4

A) False
B) True

A) 3ab
B) ab
C) 4ba
D) 5b²a

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) 3xy²
B) -7y²x
C) -5x²y
D) xy²

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