cambridge... kinda confused (1 Viewer)

[helpfulperson?]

I always see 'Use box []' to prove something. What does that exactly mean?
Here's an example:

 

[idkkdi]

I always see 'Use box []' to prove something. What does that exactly mean?
Here's an example:View attachment 39482

is it in the chapter

 

[tywebb]

Box 13 is on page 14 and Box 14 is on page 15 - in Cambridge.

Here is the solution which uses both boxes

 

[helpfulperson?]

thx. could I ask where you got that solution haha, I only have worked solutions for development and foundation

 

[tywebb]

Cambridge updated the solutions to be complete except for 3EQ3e and 6GQ17 and they were then done here: https://www.angelfire.com/ab7/fourunit/Cambridge-e2-3EQ3e-6GQ17.pdf

So now you can get complete solutions by redownloading from Cambridge and then downloading that file.