Question

Emily simplified this expression. Expression: (5−2)2+23×4 Step 1: (3)2+23×4 Step 2: 9+23×4 Step 3: 9+9×4 Step 4: 9+36 Step 5: 45 Emily made a mistake. Which step shows her first mistake? Step 1 Step 2 Step 3 Step 4

Answer 1

Given:

The expression is

`(5-2)^2+2^3* 4`

Emily simplified this expression and steps are given.

To find:

The first mistake of Emily.

Solution:

We have,

`(5-2)^2+2^3* 4`

Step 1:
`(3)^2+2^3* 4`

Step 2:
`9+2^3* 4`

Step 3:
`9+8* 4`

Step 4:
`9+32`

Step 5:
`41`

So, she made a mistake in her third step.

Therefore, the correct option is C.