CTET Paper II (Mathematics and Science) 13 Jan 2023 Solved Paper

Concept:A trinomial is an algebraic expression that contains exactly three terms, where each term is separated by a plus or minus sign.Explanation:Count the number of terms in each option.Option A: $3x^2 + 7$ – has two terms, so it is a binomial.Option B: $x^3 + 10$ – also has two terms, a binomial.Option C: $3x^2 + 3x + 7$ – has three distinct terms: $3x^2$, $3x$, and $7$. This matches the definition of a trinomial.Option D: $3x^3 + 3x^2 + 3x + 3$ – has four terms, making it a quadrinomial.Thus, only option C satisfies the condition.Answer:Option C: $3x^2 + 3x + 7$