Question

Describe how to evaluate the expression 3^2 + (21 - 9) X 6÷2.

Answer 1

The expression will be evaluated as:

`3^2+\left(21-9\right)* \:6/ \:2=45`

Explanation:

Given the expression

`3^2\:+\:\left(21\:-\:9\right)\:* \:6/ 2`

Follow the PEMDAS order of operations

Calculate within parentheses

`=3^2+12* \:6/ \:2`

Calculate exponents i.e. 3²=9

`=9+12* \:6/ \:2`

Multiply and divide (left to right) i.e. 12×6÷2=36

`=9+36`

Add and subtract (left to right) i.e. 9+36 = 45

`=45`

Thus, the expression will be evaluated as:

`3^2+\left(21-9\right)* \:6/ \:2=45`