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Subtitusikan a=-3 ke (1)
(-3)^2+3.3b-3=24
9+9b-3=24
9b=18
B=2
Jadi, b=2
a =-3
3 (-3) b + (-3)^2 - 3 = 24
-9b + 9 - 3 = 24
-9b = 24 - 9 + 3
-9b = 18
-b = 2
b = -2