If x = √3+1/2 , find the value of 4x^3 + 2x^2 - 8x + 7

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x = \frac{\sqrt{3} + 1}{2},

4 x^{3} + 2 x^{2} - 8 x + 7

x = \frac{\sqrt{3} + 1}{2}

4 x^{3} + 2 x^{2} - 8 x + 7

x = \frac{\sqrt{3} + 1}{2},

4 x^{3} + 2 x^{2} - 8 x + 7

4 x^{3} - 3 x + 5

2 x^{2} - 3 x^{3} + 5 x - 2

What must be subtracted from $4 x^{3} - 3 x + 5$ to get $2 x^{2} - 3 x^{3} + 5 x - 2$ ?

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