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12 cards from this deck
Visual way to solve by plotting graphs & finding intersections
Solutions to the simultaneous equations
Draw both graphs accurately on same coordinate system
Identify where the graphs cross each other
Exactly one point
Circle with centre at origin (0,0)(0,0)(0,0) and radius 4
Often two solutions (line crosses curve twice)
Rearrange equation to identify second graph needed
Inaccurate plotting leads to wrong intersection points
Two points (but third as check is wise)
As (x,y)(x, y)(x,y) not xxx and yyy separately
Several points around the vertex
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