Solve for A, a, b
A=-\frac{2\left(2b-5\right)}{3\left(1-b\right)}\text{, }a=-\frac{\sqrt{6\left(1-b\right)}}{2}\text{, }b<1
A=-\frac{2\left(2b-5\right)}{3\left(1-b\right)}\text{, }a=\frac{\sqrt{6\left(1-b\right)}}{2}\text{, }b<1
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