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Realuzar speraciones \( A=\left[\begin{array}{cc}2 & 1 \\ 3 & -3\end{array}\right] B=\left[\begin{array}{cc}-6 & 5 \\ 2 & -3\end{array}\right] \) \( A^{2}-B^{2} \)

Ask by May Ayala. in Venezuela
Mar 09,2025

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Answer

El resultado de \( A^{2} - B^{2} \) es: \[ \left[\begin{array}{cc} -39 & 44 \\ 15 & -7 \end{array}\right] \]

Solution

Para realizar la operación \( A^{2}-B^{2} \), primero necesitamos calcular los cuadrados de las matrices \( A \) y \( B \), y luego restarlos. Dado que \( A=\left[\begin{array}{cc}2 & 1 \\ 3 & -3\end{array}\right] \) y \( B=\left[\begin{array}{cc}-6 & 5 \\ 2 & -3\end{array}\right] \), podemos calcular los cuadrados de estas matrices de la siguiente manera: \( A^{2} = AA = \left[\begin{array}{cc}2 & 1 \\ 3 & -3\end{array}\right] \left[\begin{array}{cc}2 & 1 \\ 3 & -3\end{array}\right] \) \( B^{2} = BB = \left[\begin{array}{cc}-6 & 5 \\ 2 & -3\end{array}\right] \left[\begin{array}{cc}-6 & 5 \\ 2 & -3\end{array}\right] \) Luego, restamos \( B^{2} \) de \( A^{2} \) para obtener el resultado final. Vamos a calcular los cuadrados de las matrices \( A \) y \( B \) y luego restarlos. Matrices by following steps: - step0: Solution: \(\left[\begin{array}{ll}{2}&{1}\\{3}&{-3}\end{array}\right]\times \left[\begin{array}{ll}{2}&{1}\\{3}&{-3}\end{array}\right]\) - step1: Multiply the terms: \(\left[\begin{array}{ll}{2\times 2+1\times 3}&{2\times 1+1\times \left(-3\right)}\\{3\times 2-3\times 3}&{3\times 1-3\left(-3\right)}\end{array}\right]\) - step2: Evaluate: \(\left[\begin{array}{ll}{7}&{-1}\\{-3}&{12}\end{array}\right]\) Calculate or simplify the expression \( \left[\begin{array}{cc}-6 & 5 \\ 2 & -3\end{array}\right] \left[\begin{array}{cc}-6 & 5 \\ 2 & -3\end{array}\right] \). Matrices by following steps: - step0: Solution: \(\left[\begin{array}{ll}{-6}&{5}\\{2}&{-3}\end{array}\right]\times \left[\begin{array}{ll}{-6}&{5}\\{2}&{-3}\end{array}\right]\) - step1: Multiply the terms: \(\left[\begin{array}{ll}{-6\left(-6\right)+5\times 2}&{-6\times 5+5\left(-3\right)}\\{2\left(-6\right)-3\times 2}&{2\times 5-3\left(-3\right)}\end{array}\right]\) - step2: Evaluate: \(\left[\begin{array}{ll}{46}&{-45}\\{-18}&{19}\end{array}\right]\) Calculate or simplify the expression \( \left[\begin{array}{ll}{7}&{-1}\\{-3}&{12}\end{array}\right]-\left[\begin{array}{ll}{46}&{-45}\\{-18}&{19}\end{array}\right] \). Matrices by following steps: - step0: Solution: \(\left[\begin{array}{ll}{7}&{-1}\\{-3}&{12}\end{array}\right]-\left[\begin{array}{ll}{46}&{-45}\\{-18}&{19}\end{array}\right]\) - step1: Rewrite the expression: \(\left[\begin{array}{ll}{7}&{-1}\\{-3}&{12}\end{array}\right]+\left[\begin{array}{ll}{-46}&{45}\\{18}&{-19}\end{array}\right]\) - step2: Evaluate: \(\left[\begin{array}{ll}{7-46}&{-1+45}\\{-3+18}&{12-19}\end{array}\right]\) - step3: Evaluate: \(\left[\begin{array}{ll}{-39}&{44}\\{15}&{-7}\end{array}\right]\) El resultado de \( A^{2}-B^{2} \) es: \( A^{2}-B^{2} = \left[\begin{array}{ll}{-39}&{44}\\\\{15}&{-7}\end{array}\right] \)

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Para calcular \( A^{2} - B^{2} \), primero necesitamos encontrar \( A^{2} \) y \( B^{2} \). Calculamos \( A^{2} \): \[ A^{2} = A \cdot A = \left[\begin{array}{cc}2 & 1 \\ 3 & -3\end{array}\right] \cdot \left[\begin{array}{cc}2 & 1 \\ 3 & -3\end{array}\right] = \left[\begin{array}{cc}(2 \cdot 2 + 1 \cdot 3) & (2 \cdot 1 + 1 \cdot -3) \\ (3 \cdot 2 + -3 \cdot 3) & (3 \cdot 1 + -3 \cdot -3)\end{array}\right] = \left[\begin{array}{cc}7 & -1 \\ -3 & 12\end{array}\right] \] Ahora, calculamos \( B^{2} \): \[ B^{2} = B \cdot B = \left[\begin{array}{cc}-6 & 5 \\ 2 & -3\end{array}\right] \cdot \left[\begin{array}{cc}-6 & 5 \\ 2 & -3\end{array}\right] = \left[\begin{array}{cc}(-6 \cdot -6 + 5 \cdot 2) & (-6 \cdot 5 + 5 \cdot -3) \\ (2 \cdot -6 + -3 \cdot 2) & (2 \cdot 5 + -3 \cdot -3)\end{array}\right] = \left[\begin{array}{cc}36 + 10 & -30 - 15 \\ -12 - 6 & 10 + 9\end{array}\right] = \left[\begin{array}{cc}46 & -45 \\ -18 & 19\end{array}\right] \] Finalmente, resta \( A^{2} - B^{2} \): \[ A^{2} - B^{2} = \left[\begin{array}{cc}7 & -1 \\ -3 & 12\end{array}\right] - \left[\begin{array}{cc}46 & -45 \\ -18 & 19\end{array}\right] = \left[\begin{array}{cc}(7 - 46) & (-1 + 45) \\ (-3 + 18) & (12 - 19)\end{array}\right] = \left[\begin{array}{cc}-39 & 44 \\ 15 & -7\end{array}\right] \] Por lo tanto, \( A^{2} - B^{2} = \left[\begin{array}{cc}-39 & 44 \\ 15 & -7\end{array}\right] \).

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