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1. a^2 + 2ab + b^2 = 6^2 + 2.6.(-1) + (-1)^2 = 36 + (-12) + 1 = 25
2. a^2.b - ab^2 + a^2.b^2 = 6^2.(-1) - 6.(-1)^2 + 6^2.(-1)^2 = -36 - 6 + 36 = -6
3, 4, 5, dan 6 cara sama
soal ke 2
p = -1, q = 2 dan r = -3
p^2 - 2qr + 3p = (-1)^2 - 2.2.-3 + 3.(-1) = 1 - (-12) + (-3) = 10