Jawapan

2016-03-08T00:35:56+08:00
(-2)²-2(-2)
= 4 +4
= 8

(3)² - 2(3)
= 9 -6
= 3

-(-2)² + 2(-2)
= -4 -4
= -8

-(3) + 2(3)
= -3 +6
= 3