Jawabanmu

2014-08-24T16:33:41+07:00
A. 4(12)-30+2 dan z ? maksudnya gimana?
48-30+2
-16

b.1/3 12(-30)
1/3 (-360)
-120
2014-08-24T16:35:18+07:00
x = √144 = 12
y = √900 = 30
z = 25

a. 4x - y + 2
⇔ 4.12 - 30 + 2
⇔ 48 - 30 + 2
⇔ 20

b. 1/3 x (-y)
⇔ 1/3 (12) (-30)
⇔ 4 (-30)
⇔ - 120
1 5 1