Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$edguadralic\ equalion\ \mu rth; x^{2}-(\frac{7}{80})x+\frac{1}{40}=0$$

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