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estion 1: Find factors of \( x^{3}-7 x-6 \)

Ask by Tucker Gross. in Venezuela
Nov 21,2024

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Answer

Los factores de \( x^{3}-7x-6 \) son \( (x-3)(x+1)(x+2) \).

Solution

Factor the expression \( x^3-7x-6 \). Factor the expression by following steps: - step0: Factor: \(x^{3}-7x-6\) - step1: Rewrite the expression: \(x^{3}+3x^{2}+2x-3x^{2}-9x-6\) - step2: Factor the expression: \(x\left(x^{2}+3x+2\right)-3\left(x^{2}+3x+2\right)\) - step3: Factor the expression: \(\left(x-3\right)\left(x^{2}+3x+2\right)\) - step4: Factor the expression: \(\left(x-3\right)\left(x+1\right)\left(x+2\right)\) Los factores de \( x^{3}-7x-6 \) son \( (x-3)(x+1)(x+2) \).

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Bonus Knowledge

To tackle the polynomial \( x^{3}-7x-6 \), one approach is to look for rational roots using the Rational Root Theorem. Here, potential rational roots are the factors of the constant term (-6), which could be ±1, ±2, ±3, ±6. Testing these values can lead you to find that \( x = -1 \) is a root! Then, you can perform polynomial division to factor out \( (x + 1) \) from \( x^{3}-7x-6 \). After dividing, you’ll be left with a quadratic that can be factored or solved using the quadratic formula to find the other roots. Remember, it’s often like a treasure hunt—sometimes the first guess leads to the golden key! For practice, try plugging in values systematically to find other possible roots and experiment with synthetic division. It's a great way to see how polynomials can be broken down, plus it sharpens your problem-solving skills when you identify common mistakes like missing a negative sign!

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