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Question

The degree of polynomial $$(x +1)(x^2 - x - x^4 + 1)$$ is .................


A
5
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B
4
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C
1
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D
3
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Solution

The correct option is B 5
Let $$P(x)=(x + 1)(x^2 - x - x^4 + 1)$$
                $$= x^3 - x^2 - x^5 + x + x^2 - x - x^4 + 1$$
                $$= x^3 - x^5 - x^4 + 1$$
The heighest power of $$x$$ is $$5$$.  
Thus, the degree of the given polynomial is 5

Mathematics

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