In Exercises 8889, write each equation as a quadratic equation in y and then use the quadratic
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In Exercises 88–89, write each equation as a quadratic equation in y and then use the quadratic formula to express y in terms of x. Graph the resulting two equations using a graphing utility. What effect does the xyterm have on the graph of the resulting parabola?
16x^{2}  24xy + 9y^{2}  60x  80y + 100 = 0
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