Problem

Evaluate the determinant. \[ \left|\begin{array}{ll} -2 & 2 \\ -6 & 5 \end{array}\right| \] The determinant is (Simplify your answer.)

Solution

Step 1 :We are given a 2x2 matrix and asked to evaluate its determinant. The matrix is \[\left|\begin{array}{ll} -2 & 2 \\ -6 & 5 \end{array}\right|\]

Step 2 :The determinant of a 2x2 matrix \[\left|\begin{array}{ll} a & b \\ c & d \end{array}\right|\] is given by the formula ad - bc.

Step 3 :In this case, a = -2, b = 2, c = -6, and d = 5.

Step 4 :So, we need to calculate (-2*5) - (2*-6).

Step 5 :By performing the calculation, we find that the determinant is 2.

Step 6 :Final Answer: The determinant of the given matrix is \(\boxed{2}\)

From Solvely APP
Source: https://solvelyapp.com/problems/45946/

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