Search One Roof Education

Class 9 · Maths · Chapter 2

Is 4x² − 3x + 7 a polynomial in one variable? Write its degree.

Class 9 · Maths · Chapter 1

Explain how √2 can be located on the number line using a right-angled triangle.

Class 10 · Maths · Chapter 2

Find the zeroes of x² − 2x − 8 and verify the relationship between the zeroes and the coefficients.

Class 9 · Science · Chapter 9

State the law of conservation of momentum and use it to explain why a rifle recoils when a bullet is fired.

Class 9 · Maths · Chapter 1

Rationalise the denominator of 1/(√5 − 2).

Class 10 · Science · Chapter 1

Why must a chemical equation be balanced?

Class 9 · Science · Chapter 9

State the law of conservation of momentum.

Class 10 · Maths · Chapter 3

The sum of two numbers is 20 and their difference is 6. Form the equations and find the numbers.

Class 10 · Science · Chapter 1

A chemical equation must be balanced because matter cannot be created or destroyed — the number of atoms of each element must be the same o…

Class 9 · Science · Chapter 9

Balanced forces do not change the state of motion of an object; unbalanced forces do. Newton's first law states that an object stays at res…

Class 9 · Maths · Chapter 2

A polynomial in x is an expression of the form a₀ + a₁x + a₂x² + … where the powers of x are whole numbers. The highest power is the degree…

Class 9 · Maths · Chapter 1

Natural numbers (1, 2, 3, …) and whole numbers (0, 1, 2, …) are the starting point; integers include negatives. A rational number can be wr…

Class 9 · Maths · Chapter 4

Standard form: ax + by + c = 0, a and b not both zero Solution: ordered pair (x, y) satisfying the equation Number of solutions: infinitely…

Class 9 · Maths · Chapter 1

Laws of exponents (a, b > 0): aᵐ · aⁿ = aᵐ⁺ⁿ (aᵐ)ⁿ = aᵐⁿ aᵐ / aⁿ = aᵐ⁻ⁿ aⁿ · bⁿ = (ab)ⁿ a⁰ = 1 Rationalising factor of (√a + b) is (√a − b)…