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Alexeev081 [22]
2 years ago
7

Compute the product AB by the definition of the product of​matrices, where Ab1 and Ab2 are computed​ separately, and by the​row-

column rule for computing AB.
Matrix A= [2 -2]
[3 4]
[4 -3]

Matrix B =
[4 -1]
[-1 2]
Mathematics
1 answer:
nasty-shy [4]2 years ago
6 0

Answer:

A * B = \left[\begin{array}{ccc}10&-6\\8&5\\19&-10\end{array}\right]

Step-by-step explanation:

Given

A =\left[\begin{array}{cc}2&-2\\3&4\\4&-3\end{array}\right]

B = \left[\begin{array}{cc}4&-1\\-1&2\end{array}\right]

Required

AB

To do this, we simply multiply the rows of A by the column of B;

So, we have:

A * B = \left[\begin{array}{ccc}2*4 + -2*-1&2*-1+-2*2\\3*4+4*-1&3*-1+4*2\\4*4-3*-1&4*-1-3*2\end{array}\right]

A * B = \left[\begin{array}{ccc}10&-6\\8&5\\19&-10\end{array}\right]

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Answer:

a) 1,360,760,000

b) 1,361,000,000

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Step-by-step explanation:

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The following are the rules to round of a number:

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a)  to the nearest thousand.

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Right Digit: 1

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Hundred million place: 3

Right Digit: 6

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d)  to the nearest hundred thousand.

hundred thousand place: 7

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