f(x+3)=2x^2-3x-1
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x+3 =0
x = -3
2 ×-3^3-3×-3-1
-54 +9-1
9-55
-46 is the correct answer
x = -3
2 ×-3^3-3×-3-1
-54 +9-1
9-55
-46 is the correct answer
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