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Verify that x = 3 is a solution of the equation x<sup>2</sup> – 5x + 6 = 0. To do this, substitute
x = 3 into the equation. 3<sup>2</sup> – 5·3 + 6 = 0? 9 – 15 + 6 = 0? 0 = 0 confirmed ...
At most of the sites you can check questions that have already been asked so
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Is it okay to ask questions where you give the solution and ask ... Previously: Are “
please check my proof” type of questions proper?, Best way of ...
This question's answer in Meta points out that reading other people's long and
formal proofs is pretty boring and annoying (which I agree with).