Find 3A-2B
A= 7 4
-4 5
B= -31
8 -4
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Simplify (81a^8b^2) 1/4
A. 3a^2sqrt b
B 81a^2b1/2
C _+ 3a^2b^2
D 3a^2sqrt |b|
3a + 4b + l = 6
3a - 2b + 6l = 8
3a - 5b + 7l = 66
Present it in the form Av=w. Evaluate A^-1 and check yoursolution by verifying AA^-1 = I and A^-1 A = I: Evaluatedet(A):
