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p^2 - 2qr + 3p
(-1)^2 - 2(3)(-3) + 3(-1)
1 + 18 - 3 = 16.
b. Jika p= -2, q=3, r=1
p^2 - 2qr + 3p
(-2)^2 - 2(3)(1) + 3(-2)
4 - 6 - 6 = -8
c. Jika p=? , q=5, r=-2
p^2 - 2qr + 3p
p^2 - 2(5)(-2) + 3(p)
p^2 +3p + 20 (*nilai p nya langsung dimasukkin aja, habis itu ditambah biasa)
d. caranya sama aja ko