Question

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1) which of the following is not a polynomial?
a)
$a) \: 8x ^{3} + 7 {x}^{2} - 12x + 4 \\ b) \: 81 {a}^{2} + 4ab - 9 {b}^{2} - 6 \\ c) {a}^{3} - \frac{1}{ {a}^{3} } + 3 {a}^{2} - \frac{3}{ {x}^{2} } + 8$
${x}^{3} + {y}^{3} + {z}^{3} - 3xyz$
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Answer 1

Answer:

c)a^3 - 1/a^3 + 3a^2 - 3/x^2 + 8

is the correct answer.

Explaination- It is because a polynomial can't have a variable in fraction.

Answer 2

Answer:

(c)

Step-by-step explanation:

here, the power of a in the term -1/a³ is (-3)

the power of x in the term -3/x² is (-2)

But in a polynomial, the power of the variables must be positive integer.