📘 Class 9 – Maths
Q. What are real numbers?
Ans: Numbers that include rational and irrational numbers.
Q. What is Euclid's division lemma?
Ans: It states that a = bq + r.
Q. What is a polynomial?
Ans: An algebraic expression with non-negative powers.
Q. What is coordinate geometry?
Ans: Study of geometry using coordinates.
Q. What is a linear equation?
Ans: An equation of degree one.
Q. What is a polynomial?
Ans: Expression with variables and constants.
Q. Degree of linear polynomial?
Ans: 1
Q. Value of (a+b)²?
Ans: a²+2ab+b²
Q. What is coordinate geometry?
Ans: Study of points using coordinates.
Q. Distance formula?
Ans: √[(x₂−x₁)²+(y₂−y₁)²]
Q. Area of triangle?
Ans: ½×base×height
Q. What is rational number?
Ans: Number in p/q form
Q. What is probability range?
Ans: 0 to 1
Q. Cube root of 27?
Ans: 3