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2) 2^{x²-x-2} = 1
2^{x²-x-2}= 2°
x²₋x₋2=0
(x-2) (x+1)
x=2 x=-1 tm
3) 3^{x²₋1} = 27 3^{x²-1}= 3³ x²-1 = 3 x=√4 x=2
4) 3^{x²-2x-5} = 3⁻²
x²-2x-5 =-2
x-2x-5+2=0
x-2x-3=0
(x-3) (x+1)
x-3=0 x+1=0
x=3 x=-1 tidak memenuhi karena hasinya negatif