Question

Robbie factored the following expression incorrectly. Identify his mistake, then write a few sentences

explaining to him how to fix it.

Answer 1

3(3r - 4)(3r + 4)

Explanation:

I can't see the writing very clearly.

This is the correct solution:

27r^2 - 48 Divide through by 3:

= 3(9r^2 - 16) 9r^2- 16 is the difference of 2 squares so:

= 3(3r - 4)(3r + 4)