Question

show that the system of equation -x+2y+2=0 and 1/2x 1/2y -1=0 has a unique solution​

Answer 1

Step-by-step explanation:

-x+2y+2=0

a=-1,b1=2,c1=2

In 1/2x+1/2y-1=0

a2=1/2, B2=1/2 ,c2=-1

For unique solution

a1/a2 is not equal to b1/B2 = C1/c2

a1/a2=-1/1/2=-2

b1/B2=2/1/2=4

hence a1/a2 is not equal to b1/B2

so it is a unique solution...