The work of a student to find the dimensions of a rectangle of area 8 + 12x and width 4 is shown below:

Step 1: 8 + 12x

Step 2: 4 (4) + 4 (8x)

Step 3: 4 (4 + 8x)

Step 4: Dimensions of the rectangle are 4 and 4 + 8x

In which step did the student first make an error and what is the correct step?

Question

28 June, 05:15

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Answers (1)

Know the Answer?

Josie Adkins · Answer 1

The second step is wrong

As 12/4 is not 8 but 3

The correction steps are:

4 (4) + 4 (3x)

= 4 (4+3x)

The dimensions are 4 and 4+3x

The work of a student to find the dimensions of a rectangle of area 8 + 12x and width 4 is shown below:Step 1: 8 + 12xStep 2: 4 (4) + 4 (8x)Step 3: 4 (4 + 8x)Step 4: Dimensions of the rectangle are 4 and 4 + 8xIn which step did the student first make an error and what is the correct step?