Question

find the value of x​

Answer 1

Step-by-step explanation:

A = | 3 1 | , X = |x1 |

| 1 3 | |x2 |

AX = B

3x(1) + x(2) = 3 -----(1)

x(1) + 3x(2) = 4

2x(1) - 2x(2) = -1

x(1) - x(2) = -1/2

x(1) = x(2) - 1/2 ------(2)

from equation (1)

3x(2) - 3/2 + x(2) = 3

4x(2) - 3/2 = 3

4x(2) = 9/2

x(2) = 9/8

from equation (2)

x(1) = 9/8 - 1/2 = 9-4/8 = 5/8

So , Matrix X = | 5/8 |

| 9/8 |

order of Matrix X = row * Column = 2*1