A. 5/x - 3 = x² B. x(x + 5) = 2 C. n - 1 = 2n D. 1/x²(x + 2) = x

Answer: B. x(x + 5) = 2 Answer: (B) x(x+5)=2 x(x+5)=2 ⇒ x²+5x-2=0 , a polynomial equation of degree 2. (A) gives x³+3x-5=0 (degree 3), (C) is linear, and (D) gives x³-x-2=0 (degree 3).

Q.1 (A)(ii) From the following equations which one is the quadratic equation ?

A. \(\dfrac{5}{x} - 3 = x^2\)

B. \(x(x + 5) = 2\)

C. \(n - 1 = 2n\)

D. \(\dfrac{1}{x^2}(x + 2) = x\)

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Answer: B. \(x(x + 5) = 2\)

Answer: (B) \(x(x+5)=2\)

\(x(x+5)=2 \Rightarrow x^2+5x-2=0\), a polynomial equation of degree 2.

(A) gives \(x^3+3x-5=0\) (degree 3), (C) is linear, and (D) gives \(x^3-x-2=0\) (degree 3).

Doubtly AI · 24 Oct 2026 AI-verified · Oct 2026 Report

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Q.1 (A)(ii) From the following equations which one is the quadratic equation ?

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