The degree of trinomial $a x^{5} - b x^{4} + c$ is

9

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5

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4

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1

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Solution

The correct option is D $5$
The polynomial $a x^{5} - b x^{4} + c$ has three terms. The first one is $a x^{5}$ , the second is $- b x$ , and the third is $c$ .

The exponent of the first term is $5$ .

The exponent of the second term is $1$ because $- b x = - b x^{1}$ .

The exponent of the third term is $0$ because $c = c x^{0}$ .

Since the highest exponent is $5$ , therefore, the degree of $a x^{5} - b x^{4} + c$ is $5$ .

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a x^{5} + b x^{4} + c x^{3} + d x^{2} + e x

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a, b, c, d, e ϵ R

f (x) = 0

α

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