Question

In the step-by-step simplification of the expression below, which property is not used?3(1 + x)3(x + 1)3•x + 3•13x + 3A)associativeB)commutativeC)distributiveD)identity

Answer 1

`\begin{gathered} \text{ } \\ \text{If a o b = b o a, then binary operation o is commutative.} \\ In\text{ this case x+1 and 1+x is commutative} \end{gathered}`

Hence, commutative is used

Also; distributive is used when 3(x+1)= 3(x) + 3(1)

Also, identity is used when it is 3x+3.

The only property that is not used is Associative property.

Associative property occurs over an operation and we have two operations here which are multiplication and addition.