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Janusz
办美国文凭加拿大文凭澳洲文凭英国文凭学位证毕业证成绩单
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Wendy Ye
There are two taps A and B. A can fill up a tank in 5 ,im and B can fill up the same tank in 10 min.
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4 hours ago
There are two taps A and B. A can fill up a tank in 5 ,im and B can fill up the same tank in 10 min.
![If A = [[2,-1],[3,2]] and B = [[0,4],[-1,7]] , find (3A^2 - 2B + I).](http://i.ytimg.com/vi/0DhveErBAHA/mqdefault.jpg "If A = [[2,-1],[3,2]] and B = [[0,4],[-1,7]] , find (3A^2 - 2B + I).")
