Question

What is the student’s error?

Answer 1

Answer:

The answer to the question is 10a√2a(b + 2)

Step-by-step explanation:

To know the student's error, let us calculate the perimeter from the the start.

Dimension of the rectangle is given below:

√(50a³b²) and √(200a³)

Perimeter of a rectangle = 2(L + B) = 2L + 2B

2√(50a³b²) + 2√(200a³)

2 x 5ab√2a + 2 x 10a√2a

10ab√2a + 20a√2a

Factorise

10a√2a (b + 2)

Therefore, the student made an error by adding 10ab√2a and 20a√2a together.

Note: we can not add 10ab√2a and 20a√2a together since b is missing in one of the expression.

Therefore, the answer to the question is 10a√2a(b + 2).

Answer 2

Answer:

d

Step-by-step explanation: