(English Medium) ICSE Class 9 - CISCE Question Bank Solutions

Factorise : 4a² - 12a + 9 - 49b²

Factorise : 4xy - x² - 4y² + z²

Factorise : a² + b² - c² - d² + 2ab - 2cd

Factorise : 4x² - 12ax - y² - z² - 2yz + 9a²

Factorise:

(a² − 1) (b² − 1) + 4ab

Factorise : x⁴ + x² + 1

Factorise : (a² + b² - 4c²)² - 4a²b²

Factorise : (x² + 4y² - 9z²)² - 16x²y²

Factorise : (a + b) ² - a² + b²

Factorise : a² - b² - (a + b) ²

Factorize : 9a² - (a² - 4) ²

Factorise : `x^2 + 1/x^2 - 11`

Factorise : `4x^2 + 1/(4x)^2 + 1`

Factorise : 4x⁴ - x² - 12x - 36

Factorise : a² ( b + c) - (b + c)³

Solve, using cross-multiplication :
4x + 3y = 17
3x - 4y + 6 = 0

Solve, using cross-multiplication :
3x + 4y = 11
2x + 3y = 8

Solve, using cross-multiplication :
6x + 7y - 11 = 0
5x + 2y = 13

Solve, using cross-multiplication :
5x + 4y + 14 = 0
3x = -10 - 4y

Solve, using cross-multiplication :
x - y + 2 = 0
7x + 9y = 130