Question

find A=2B if A=2×square +4×+3and B=5×square​

Answer 1

Answer:

We know that

∣AB∣=∣A∣∣B∣

Also for a square matrix of order 3

∣KA∣=K

3

∣A∣because each element of the matrix A is multiplied by k and hence in this case we will have k

3

common.

∴∣3AB∣=3

3

∣A∣∣B∣=

=27(−1)(3)=−81

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

A = 2²+4x+3

A = 4 + 4x+3

A= 7 + 4x

B = 5²

B= 25

7+4x= 25

4x = 25-7

4x= 18

x= 18/4

x= 4.5

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