Class 9 Maths MCQ – Polynomials in One Variable

This set of Class 9 Maths Chapter 2 Multiple Choice Questions & Answers (MCQs) focuses on “Polynomials in One Variable”.

1. (x-y)2 = __________
a) x2 + 2xy+y2
b) x2 – 2xy+y2
c) x2 – y2
d) x2 + y2
View Answer

Answer: b
Explanation: We can write (x-y)2 as (x-y) * (x-y) = x2-xy-yx + y2
= x2-2xy + y2.

2. How many terms are there in a polynomial 5x2+2x-2?
a) 1
b) 2
c) 3
d) 4
View Answer

Answer: c
Explanation: We can get number of terms by separating them by “+” or “” sign.
In the given polynomial 5x2+2x-2, if we separate expressions by “+” or “” sign, we get three separate terms as 5x2, 2x and 2.
Hence we can say that there are three terms in the polynomial 5x2+2x-2.

3. Which of the following is the example of Trinomial?
a) 9x3+ 5x2+7x+2
b) 9
c) 7x-2
d) 5x2+2x-2
View Answer

Answer: d
Explanation: Polynomials only having three terms are called Trinomials.
Hence to find trinomial polynomial, we have to find polynomial which has three terms. We can see that 5x2+2x-2 has three terms namely 5x2, 2x and 2. Hence it is trinomial.
Similarly, polynomials only having one term are called Monomials and polynomials only having two terms are called Binomials.

Sanfoundry Global Education & Learning Series – Mathematics – Class 9.

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