Question
Q:
Quadratic equations can be solved by graphing, using the quadratic formula, completing the square, and factoring. What are the pros and cons of each of these methods? When might each method be most appropriate? Which method do you prefer? Why?
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Mat117 Week7 DQ2
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- Posted on Jan. 08, 2010 at 11:43:16AM
A:
Preview: ... this is the best method to use, because we can immediately realize that if the discriminant is negative. The downside of this method is that we have to be systematic with the calculations because it involves taking a square, a product, then a difference followed by a square root, another addition/subtraction followed by a division. Also, while replacing the coefficients, we must be careful of the signs.
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Factoring is also quite easy if we can mentally split the coefficient of the middle term containing x, such that their product is equal to the prod ...
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