Whakaoti mō x, y, z, a, b
x=-\frac{1}{2}=-0.5\text{, }y=-\frac{25}{2}=-12.5\text{, }z=-13\text{, }a=-13\text{, }b=-13
x=\frac{25}{2}=12.5\text{, }y=\frac{1}{2}=0.5\text{, }z=13\text{, }a=13\text{, }b=13
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