- 2x^2+x-15=0 I use the quadratic formula but im not getting -3 and 5/2 as my solution.?

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Lithium and oxygen react to form a ionic comping. How many electrons must the atoms of the elements gain or lose to become stable? Simple interest earned to the nearest cent 1050, 4.6, 2 years? Find all points c satisfying the conclusion of the Mean Value Theorem for the function f(x)=−sqrt(3)cos(x)−sin(x) and interval [0,2π].? Using the principle of least squares, derive the normal equation for the curve y=ab^x? What is chastened?

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