r6ob5ertsalem
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  1. what is the solution of the matrix equation ?

[9 4] x= [-9 -6]

[2 1] [-1 -8]

A[5 -26]

[9 -60]

B[-5 26]

[-1 -8]

C[-5 26]

[9 -60]

D[9 26]

[9 1]



solve the system

{ 2x +y - 4z = -30

{ 3x + 2y +2z =-8

{5x + 5y + z = -26

A(-30,-8,-26)

B.(4,-2,4)

C(-4,-2,4)

D.(-4,2,-4)

Verified Answer :

Ckaranja

C= \(\left[\begin{array}{ccc}-5&26&\\9&-60\end{array}\right]\)
Find the determinant;

91- 24= 1

Inverse of the matrix;
1(\(\left[\begin{array}{ccc}1&-4\\-2&9\end{array}\right]\)

Pre-multiplying the matrix by the inverse on both the left hand side and the right hand side gives the answer above.

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