Final answer to the problem
Step-by-step Solution
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- Write in simplest form
- Solve by quadratic formula (general formula)
- Find the derivative using the definition
- Simplify
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- Find the derivative
- Factor
- Factor by completing the square
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We can factor the polynomial $3x^3-45x-12$ using the rational root theorem, which guarantees that for a polynomial of the form $a_nx^n+a_{n-1}x^{n-1}+\dots+a_0$ there is a rational root of the form $\pm\frac{p}{q}$, where $p$ belongs to the divisors of the constant term $a_0$, and $q$ belongs to the divisors of the leading coefficient $a_n$. List all divisors $p$ of the constant term $a_0$, which equals $-12$
Learn how to solve synthetic division of polynomials problems step by step online.
$1, 2, 3, 4, 6, 12$
Learn how to solve synthetic division of polynomials problems step by step online. Simplify the expression (3x^3-45x+-12)/(x-4). We can factor the polynomial 3x^3-45x-12 using the rational root theorem, which guarantees that for a polynomial of the form a_nx^n+a_{n-1}x^{n-1}+\dots+a_0 there is a rational root of the form \pm\frac{p}{q}, where p belongs to the divisors of the constant term a_0, and q belongs to the divisors of the leading coefficient a_n. List all divisors p of the constant term a_0, which equals -12. Next, list all divisors of the leading coefficient a_n, which equals 3. The possible roots \pm\frac{p}{q} of the polynomial 3x^3-45x-12 will then be. Trying all possible roots, we found that 4 is a root of the polynomial. When we evaluate it in the polynomial, it gives us 0 as a result.
