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Question

State whether the given expressions are polynomials or not.
(a) 3x34xy+z23x+3y
(b) 3a2b4b3+b2
(c) 52x24yz56x2
(d) 3p34q23+pqr+3pq


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Solution

(a) 3x34xy+z23x+3y
Yes. Because there are no negative or fractional powers for the variables.

(b) 3a2b4b3+b2
No. Because, there is a square root over b. So, there is fractional power over a variable.

(c) 52x24yz56x2
Yes. Because although the coefficient 52 and 56 are fractional coefficients, the powers of variables are all whole numbers.

(d) 3p34q23+pqr+3pq
No. Because there is a fractional power over q.

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