f) \( 12 x^{2}-x-6 \)
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Beyond the Answer
Did you know that factoring quadratic equations like \( 12x^2 - x - 6 \) can be likened to solving a puzzle? You’re trying to find two numbers that give you the middle coefficient and when multiplied, yield the product of the leading coefficient and the constant term. In this case, you want two numbers that multiply to \(-72\) (since \(12 \times -6\)) and add up to \(-1\). The magic numbers here are \(8\) and \(-9\). Now, let's put those numbers to good use! You can re-write the middle term using \(8\) and \(-9\) as \(12x^2 + 8x - 9x - 6\). Then, factor by grouping! Pull out common factors from the first and second pairs: \(4x(3x + 2) - 3(3x + 2)\). Voila! You’ve factored it into \((3x + 2)(4x - 3)\). Solving quadratic equations can be like magic, don’t you think?
