Calculate 3

Calculate the cube volume whose edge is 3x-1,3x-1,3x-1

Result

V = (Correct answer is: 27 x^3 - 27 x^2 + 9 x - 1) Wrong answer

Solution:

a=3x−1 V=a3 V=(3x−1)3 V=27 x3−27 x2+9 x−1a=3x-1 \ \\ V=a^3 \ \\ V=(3x-1)^3 \ \\ V=27 \ x^3 - 27 \ x^2 + 9 \ x - 1

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