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Question
Solve graphically : x ≥ 0 and y ≥ 0
Solution
Consider the lines whose equations are x = 0, y = 0.
These represents the equations of Y-axis and X-axis respectively, which divide the plane into four parts.
Since x ≥ 0, y ≥ 0, the solution set is in the first quadrant which is shaded in the graph.
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