Question

find A &B by using Cramer's rule

Answer 1

Answer:

Step-by-step explanation:

D= |1 2|

|2 -3|

1×(-3) - 2×2

-3-4

= -7

Dx= |1. A|

|12 3|

1(3)- (a)(12)

3- 12a

a= 12-3

A=9

Dy= |1. -1

|b. 12|

1(12)-(-1)(b)

12+b

b = 12

.

. . The value of A and B is 9 and 12