which of the following is not a linear equation plz plz plz help paper

Answer:
of course B
Step-by-step explanation:
it is equation of the second dgree
linear equation means x is first dgree (power of x should be 1)
so when you solve all of them by multiplying all of them you will find out that 3 of them will give you x with power 1 expect of B will give you x with power 2 which is parabola equation