To find the next approximation using Newton's Method, we need to follow these steps:
Given function f(x) = -3x^5 + 2x^4 + 8x^3 + 2 .
1. Find the derivative of the function f(x) :
f'(x) = \frac{d}{dx}(-3x^5 + 2x^4 + 8x^3 + 2)
f'(x) = -15x^4 + 8x^3 + 24x^2
2. Substitute the initial approximation x_1 = 2 into the formula for Newton's Method to get the second approximation:
x_2 = x_1 - \frac{f(x_1)}{f'(x_1)}
x_2 = 2 - \frac{-3(2)^5 + 2(2)^4 + 8(2)^3 + 2}{-15(2)^4 + 8(2)^3 + 24(2)^2}
x_2 = 2 - \frac{-96 + 32 + 64 + 2}{-240 + 64 + 96}
x_2 = 2 - \frac{2}{-80}
x_2 = 2 + 0.025
x_2 = 2.025
Therefore, the third approximation to the root is x_3 = 2.025 .
\boxed{x_3 = 2.025}