Use Cramer’s Rule to solve (if possible) the system of linear equations. 2x-y=-10 3x+2y=-1

Question
Forms of linear equations
asked 2020-11-30
Use Cramer’s Rule to solve (if possible) the system of linear equations.
2x-y=-10
3x+2y=-1

Answers (1)

2020-12-01
Here,
\(D=[(2,-1),(3,2)]=4-(-3)=7\)
\(D_x[(-10,-1),(-1,2)]=-20-1=-21\)
\(D_y=[(2,-10),(3,-1)]=-2-(30)=28\)
By using cramer's rule
\(x=D_x/D=(-21)/7=-3\)
\(y=D_y/D=28/7=4\)
Thus,
x=-3
y=4
0

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