I am having problem with DashCAT 10 question 49 type of questions, the inequality ones where there's that weird alternating +ve -ve signs... I don't understand the logic behind it. Any help will be appreciated. Thank you. (fyi. in case it helps with the explanation, I understand the part of inequality where you solve a quadratic eqn. and then input the values along the number line to figure out the solution region)

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