1. **State the problem:** Simplify or factor the polynomial $2x^3 - 3x^2 - 3x + 2$.
2. **Recall the factoring approach:** For cubic polynomials, try to find rational roots using the Rational Root Theorem, then factor by division.
3. **Possible rational roots:** Factors of constant term 2 over factors of leading coefficient 2 are $\pm1, \pm2, \pm\frac{1}{2}$.
4. **Test $x=1$:**
$$2(1)^3 - 3(1)^2 - 3(1) + 2 = 2 - 3 - 3 + 2 = -2 \neq 0$$
5. **Test $x=2$:**
$$2(2)^3 - 3(2)^2 - 3(2) + 2 = 2(8) - 3(4) - 6 + 2 = 16 - 12 - 6 + 2 = 0$$
So, $x=2$ is a root.
6. **Divide polynomial by $(x-2)$:**
Using synthetic division:
Coefficients: 2 | -3 | -3 | 2
Bring down 2.
Multiply 2 by 2 = 4, add to -3 = 1.
Multiply 1 by 2 = 2, add to -3 = -1.
Multiply -1 by 2 = -2, add to 2 = 0 remainder.
So quotient is $2x^2 + x -1$.
7. **Factor quadratic $2x^2 + x -1$:**
Find two numbers that multiply to $2 \times (-1) = -2$ and add to $1$.
These are 2 and -1.
Rewrite:
$$2x^2 + 2x - x -1 = 2x(x+1) -1(x+1) = (2x -1)(x+1)$$
8. **Final factorization:**
$$2x^3 - 3x^2 - 3x + 2 = (x - 2)(2x - 1)(x + 1)$$
**Answer:** The polynomial factors as $(x - 2)(2x - 1)(x + 1)$.
Factor Polynomial Dfe606
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