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(2) + 4x(2)
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 know to be the formula of area of a rectangle ?

Answer 2

Base X Height

Answer 3

or base x width x height

Answer 4

depending if its 3D or 2D

Answer 5

i learned from flvs. xD

Answer 6

now which is the base and which is the hight?

Answer 7

like i said.. in this case i dont know.

Answer 8

i think step 2 is wrong