Question

1
If A = 1 2 3
-1 1 2
1 2 4
B = -3
-6
-9
and AX = B then find X​

Answer 1

Answer:

AX=B

(123-112-124)X=. -3-6-9

(123-236)x= -18

(-113)x=-18

-113X= -18

x=-18/-113

x=18/113

Answer 2

Solution:

here, A = 123 -112 +124

A = 123 +124 -112

A = 247 -112

A = 135   ------1

And B = -3 -6 -9

B = -9 -9

B = -18    -----2

here, given in the question that

AX =B    ------3

to find X we have to putt the value of A and B from equation 1 and equation 2 to equation 3 we get

135X = -18

X =-18/135

X = -0.133333333

therefore, the value of X is -0.133333333