Question

http://prntscr.com/9n2j26 2?

Answer 1

Close
6 + 2(2) - 8(2)
6 + 4 - 16
10 - 16
-6

but if we use -2:
6 + 2(-2) - 8(-2)
6 - 4 + 16
2 + 16
18

Answer 2

oh

Answer 3

i forgot that negative 5 thx

Answer 4

No problem :)