Solve
Distribute the over the bracket. Multiply both terms inside by , taking care with the minus sign:
Subtract from both sides. The larger coefficient is on the left, so collecting there keeps things positive:
Add to both sides.
The coefficient of is already , so there is no division step and therefore no opportunity for a sign flip.
Test the two regions and the boundary. At : left , right , and . At : left , right , and is false . At both sides equal , so the strict inequality rightly excludes it. Solution set: .
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