Problem

Find the determinant of the 3x3 matrix: A=[253 122 051]

Answer

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Answer

Step 3: Simplify the above expression: det(A)=2(210)5(1)+(3)(5)=2(8)+5+(15)=16+515

Steps

Step 1 :Step 1: Use the formula for finding the determinant of a 3x3 matrix, which is: det(A)=a(eifh)b(difg)+c(dheg) where a, b, c, d, e, f, g, h, and i are the elements of the matrix.

Step 2 :Step 2: Substitute the matrix elements into the formula: det(A)=2((2)(1)(25))5((1)(1)(20))+(3)((1)(5)(20))

Step 3 :Step 3: Simplify the above expression: det(A)=2(210)5(1)+(3)(5)=2(8)+5+(15)=16+515

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