[micky2100]

what is the value of x

1)x pow2-y pow 2=0
2) x/y+y/x=0

1)x pow2=y pow2
x=+y or x=-y

insuff

2)

x/y=-y/x
x pow 2=-y pow 2
x =sqrt[(-1)*y pow 2]
x=sqrt(-1)* y or x=sqrt(-1) *(-y)

this is also insuff

but the answer is 2 is suff to answer the qst