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Which expressions are polynomials? Select the two correct answers. (2 points)

A. x4+2y2+z−w2
B. x−3+x√
C. x−3−x+1
D. −4x8

Sagot :

À is for sure and b too since they both have more than one variable.
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Answer:

  A, D

Step-by-step explanation:

Only expressions that are constant, or with variables to positive integer powers are polynomials.

A square root is a fractional power. (eliminates B)

-3 is not a positive power. (eliminates C)

The remaining choices are A and D.

  A.  x^4 +2y^2 +z -2^2 . . . . is a polynomial

  D.  -4x^8 . . . . is a polynomial

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