Mathematics, 12.08.2020 14:01 fatherbamboo

Q7. If a + d $\left[\begin{array}{ccc}a&b\\c&d\end{array}\right]^{2} =\left[\begin{array}{ccc}1&0\\0&1\end{array}\right]$ and , then ad is (A) –1 (B) 0 (C) 2 (D) 1 Answer plz

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