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What’s the answer I need help pls? Can somebody give me the answer pls plssss?

What’s the answer I need help pls? Can somebody give me the answer pls plssss?-example-1
User Bob Swager
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1 Answer

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Answer:

The determinant of this matrix is

2(5) - (-7)(-2) = 10 - 14 = -4.

This matrix has an inverse, but there are some square matrices whose determinant is zero and therefore do not have an inverse. Abid's friend is correct. So a + b + c + d = 2 + (-7) + (-2) + 5 = -2.

User Martin Stolz
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