If \( A=\left[\begin{array}{ll}1 & -1 \\ 2 & -1\end{array}\right], B=\left[\begin{array}{cc}a & ... VIDEO
If \( A=\left[\begin{array}{ll}1 & -1 \\ 2 & -1\end{array}\right], B=\left[\begin{array}{cc}a & 1 \\ b & -1\end{array}\right] \) and \( (A+B)^{2}=A^{2}+B^{2} \) then find \( a \) and \( b \).https://bit.ly/YTAI_PWAP https://www.pw.live
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