Which expressions are equivalent? Select Equivalent or Not equivalent for each pair of expressions.

Equivalent Not equivalent
3(a−b) and 3a−3b
Equivalent – 3( a−b ) and 3a−3b
Not equivalent – 3( a−b ) and 3a−3b
2a(2+b) and 4ab
Equivalent – 2a( 2+b ) and 4ab
Not equivalent – 2a( 2+b ) and 4ab