Jika a= -3 , b= 8 , c= -2, hitunglah nilai dari : 3ab+bc-2ac

a = -3
b = 8
c = -2

3ab + bc -2ac
=3(-3 x 8) + 8 x (-2) + 2(-3 x -2)
= (-72) - 16 + 12
= -88 + 12
= - 76

(3. -3.8)+ (8.-2) (-2.-3.-2)
=(3.-24)+(-16)-12
= -72-18
= -90