Hey there,
So the line give to us is as follows, AC = 14, AB = 5√2 so solve for BC.
To start we have to simplify and rould AB, meaning 5√2 would also be about 7 when simplified.
Now all we have to do is subtract AB from AC to know the value of BC. So when we do that we get:
Therefore, BC is equal to about 7.
To have a more accurate answer you would need to subtract 14 by 5√2 and if you plug that into your calculator you should get 6.928932188.
This could be rounded to 7 or written as 14 - 5√2.
Hope I helped,
Amna