Question

4 9 7
Evaluate the determinant 3 5 7
5 4 5​

Answer 1

Answer:

70

Step-by-step explanation:

4,9,7),(3,5,7),(5,4,5)

| 4|(5,7),(4,5)| - 9|(3,7),(5,5)| + 7|(3,5),(5,4)|

= 4(25 - 28) - 9(15 - 35) + 7(12 - 25)

= 4(-3) - 9(-20) + 7(-13)

= -12 + 180 - 91

= 180 -103

= 77

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