Question

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

Answer 1

the correct value for unique solution of equation is 8

Answer 2

4/2 must not Equal to p/2 (since unique solution)
Therefore p can take all real values expect 4 Or p€[R-4]