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Question Number 184980 by Shrinava last updated on 15/Jan/23

$$\sqrt{7}+\sqrt{6}=\mathrm{a}$$$$\sqrt{7}-\sqrt{6}=?$$

Answered by SEKRET last updated on 15/Jan/23

$$\times \{\begin{array}{l}\sqrt{7}+\sqrt{6}=\mathbf{a}\\ \sqrt{7}-\sqrt{6}=\mathbf{x}\end{array}$$$$\mathbf{ax}=1$$$$\mathbf{x}=\frac{1}{\mathbf{a}}$$

Commented by Shrinava last updated on 15/Jan/23

$$\mathrm{thank}\mathrm{you}\mathrm{ser}\mathrm{cool}$$

Answered by aba last updated on 15/Jan/23

$$\sqrt{7}-\sqrt{6}=\frac{(\sqrt{7}-\sqrt{6})(\sqrt{7}+\sqrt{6})}{\sqrt{7}+\sqrt{6}}=\frac{7-6}{\mathrm{a}}=\frac{1}{\mathrm{a}}$$

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