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Pre-Calc

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Find all real zeros for each equation.1. f(x)=x^3-3x^2-4x 2. f(x)= x^6-x^2 3. f(x)=x^3+3x^2-16x-48 4. f(x)=9x^4-37x^2+4
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The travel time between two cities is inversely proportional to the average speed. A train travels between the cities in 3 hours
1. 5 answers
2. 762 views