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I have trouble solving quadratic inequalities. I dont understand when you use (or) and when you just put it all together. Ex. -2x^2+3x+6 greater than...

I have trouble solving quadratic inequalities. I dont understand when you use (or) and when you just put it all together.
Ex.
-2x^2+3x+6 greater than or equal to 2. How do I know which it is?

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