a) \( x^{2}+6 x+3 \)
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The Deep Dive
Did you know that the quadratic equation \( x^{2}+6x+3 \) can be solved using the quadratic formula? The roots are derived from the formula \( x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \) where \( a=1, b=6, c=3 \). This process opens up avenues to understand the geometric interpretations of parabolas and their intersections with the x-axis! Now, let's not forget some common pitfalls! One common mistake is miscalculating the discriminant \( b^2 - 4ac \); if this value is negative, your roots will be complex. Take care with sign errors in your calculations, especially when working with the square root. Double-checking each step will save you from a mathematical headache!