Question

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?
Step 2; 4(2) + 4x(2)
Step 2; 4(2) + 4(3x)
Step 3; 4 + (4 + 8x)
Step 3; 4 + (4 ⋅ 8x)

Answer 1

What do you think?

Answer 2

I think step 2.

Answer 3

yes its step 2 good...

Answer 4

now...

Answer 5

Now which option?

Answer 6

A or B?

Answer 7

b

Answer 8

Excellent its the correct answer....

Answer 9

Thanks :)