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Consider the function:

f (x) = -2x^3 + 2x^2 + 24x

Question:
Use the Fundamental Theorem of Algebra to determine the number of roots.

1 Answer

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Answer:

Hi

Explanation:

The Fundamental Theorem of Algebra states that a polynomial function of degree n has exactly n complex roots (counting multiplicities).

To determine the number of roots for the function

f(x) = -2x^3 + 2x^2 + 24x, we need to find the degree of the polynomial.

The degree of a polynomial is the highest power of the variable in the polynomial expression.

In this case, the highest power of x is 3, so the degree of the polynomial is 3.

According to the Fundamental Theorem of Algebra, this means that the polynomial has exactly 3 complex roots.

Please note that complex roots can be either real or imaginary. Real roots are values of x that make the polynomial equal to zero, while imaginary roots involve the imaginary unit i.

In summary, the function f(x) = -2x^3 + 2x^2 + 24x has exactly 3 complex roots, which can be a combination of real and/or imaginary numbers.


f(x)=-2x^3+2x^2+24x\\=-2x(x^2-x-12)\\=-2x(x^2+3x-4x-12)\\=-2x(x(x+3)-4(x+3))\\\\=-2x(x+3)(x-4) \ and\ there\ are \ 3\ roots:\ 0,-3,4

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