Directions: Determine if the linear binomial is a factor of the given polynomial. If it is, then find the remaining factors of the polynomial. 3. \( x^{3}-3 x+2 ; x+2 \)
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Beyond the Answer
To determine if \( x+2 \) is a factor of \( x^3 - 3x + 2 \), apply the Factor Theorem, which states that if \( x+c \) is a factor, then \( f(-c) = 0 \). Here, set \( c = 2 \) and evaluate \( f(-2) \): \( f(-2) = (-2)^3 - 3(-2) + 2 = -8 + 6 + 2 = 0 \). Since \( f(-2) = 0 \), \( x+2 \) is indeed a factor! Now to find the remaining factors, perform polynomial long division: Dividing \( x^3 - 3x + 2 \) by \( x+2 \) gives \( x^2 - 2x + 1 \) or \( (x-1)^2 \). Therefore, the factorization is \( (x+2)(x-1)^2 \). Fun fact: This polynomial has a double root at \( x = 1 \). Imagine it as a dance where the point \( (1, 0) \) does a little twirl instead of just passing by, which adds some flair to the polynomial's graph!
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