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Linear algebra

mustish1
mustish1 asked
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Last Modified: 2016-09-10
These questions are from millions of online tutorials and YouTube websites. I don’t know if I am allowed to ask experts to explain those questions in a different way. They are not homework assignments. I am trying to develop my own web site. Math’s has many ways to solve the problems. Just want to understand them.

1. My question is why the answer is not -4

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