Question

Will Medal.!
Identify the variable expression that is not a polynomial.

A. 12
B. y-9 + x6
C. x8 + y2
D. x + 14

Answer 1

y-9 is \[y ^{-9}\]??

Answer 2

for e.g.,
3xy^-2 is not, because the exponent is "-2" (exponents can only be 0,1,2,...)
2/(x+2) is not, because dividing by a variable is not allowed
1/x is not either
√x is not, because the exponent is "½" (see fractional exponents)
But these are allowed:

x/2 is allowed, because you can divide by a constant
also 3x/8 for the same reason
√2 is allowed, because it is a constant (= 1.4142...etc)

Answer 3

so.,B is not a polynomial if y-9 is\[y ^{-9}\]

Answer 4

im lost lol

Answer 5

your right :) thanks