If x = 2, what's the value of \(7 x^{3}+6 x^{2}-5 x-4 ?\)

66

Explanation

Solving each part of this equation by substituting 2 for x:
\(7 x^{3}+6 x^{2}-5 x-4\)
\((7 \times 2^3) + (6 \times 2^2) - (5\times 2)-4\)
\((7 \times 8) + (6 \times 4) - 10 - 4\)
\(56 + 24 - 10 - 4 = 66\)

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