write any two situation of using quadratic formula
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Quadratic equations are also useful in calculating speeds. Avid kayakers, for example, use quadratic equations to estimate their speed when going up and down a river. Assume a kayaker is going up a river, and the river moves at 2 km per hour.
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1. -x² +6x + 18 = 0.
2.5x² - 2x - 9 = 0
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