a) ( - 8 ) . ( 12 + 14 ) + 12 . ( 8 - 14 ) b) 35 . ( 17 - 25 ) - 25 . ( 17- 35 ) c) -136 . ( 64 - 95 ) - 64 . ( - 95 - 136)

a) `(-8) . (12+14) + 12.(8-14)`

` = -8.12 - 8.14 + 12.8 - 12.14`

` = (-8.12 + 12.8) - 14(8+12)`

` = 0 - 14 . 20`

` = 0 - 280`

` = -280`

b) `35 . (17-25) - 25 . (17-35)`

` = 35 . 17 - 35 . 25 - 25.17 + 25 . 35`

` = 17(35-25) + (25.35 - 35.25)`

` = 17 . 10 + 0`

` = 170 + 0`

` = 170`

c) ` -136 . (64 - 95) - 64 . (-95 - 136)`

` = -136 . 64 + 136 . 95 + 64 . 95 + 64 . 136`

` = (-136 . 64 + 64.136) + 95(136+64)`

` = 0 + 95 . 200`

` = 95 . 200`

` = 19000`