Question

Is it true to say that the pair of equations?
-x+2y+2=0 and 1/2x-1/4y-1=0
Has a unique solution? Justify your answer.

Answer 1

according to unique solution A1/A2is not equal to B1/B2
-1/1/2 is not equal to 2/-1/4
so this is not equal we can say they have unique solution

Answer 2

Answer:

Here,

a1/a2 = -1/1/2 = -1×2 = -2

b1/b2 = 2/-1/4 = -2×4 = -8

Hence a1/a2 is not equal to b1/b2

Thus, the given system of equations have unique solution .