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Question Number 24152 by Joel577 last updated on 13/Nov/17
$$\mathrm{Let}\:\mathrm{matrice}\:{A}\:=\:\begin{pmatrix}{{a}}&{{b}}\\{{c}}&{{d}}\end{pmatrix},\:\mathrm{and}\:{A}^{{T}} \:=\:{A}^{−\mathrm{1}} \\ $$$$\mathrm{Find}\:{d}\:−\:{bc} \\ $$
Commented by 1kanika# last updated on 26/Nov/17
$$\mathrm{1} \\ $$