Question

for which value of p, does the pair of equations given below has unique solutuon? 4x+py+8=0 , 2x+2y+2=0

Answer 1

For unique solution,

a1/a2 =/= b1/b2

Thus

4/2 =/= p/2

This p =/= 4

For p not equal to 4 the equations have unique solution.