Question

i need help!!!!
[1 -4]
+[-2 6]
[3 5] [-2 4]

Answer 1

[ 1 - 4] 
= 1- 4
= 1 + - 4
= - 3

+ [ - 2 6]
= - 12

[ 3 5][ - 2 4]
(3)(5)(( - 2)(4))
= 15(( - 2)(4))
= (15)( - 8 )
= - 120