Question 169326
2P^2-2P-5=0
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Always try to factor first, failing that you can always use the "quadratic equation".  In this case, you can't factor so you must use the quadratic equation.
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Doing so will yield:
P = {2.158, -1.158}
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Details of the quadratic below:
*[invoke quadratic "P", 2, -2, -5 ]