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

Factories: (x² - 3x)(x² - 3x - 1) - 20.

Find trinomial (quadratic expression), given below, find whether it is factorisable or not. Factorise, if possible.
x² - 3x - 54

Find trinomial (quadratic expression), given below, find whether it is factorisable or not. Factorise, if possible.
2x² - 7x - 15

Find trinomial (quadratic expression), given below, find whether it is factorisable or not. Factorise, if possible.
2x² + 2x - 75

Find trinomial (quadratic expression), given below, find whether it is factorisable or not. Factorise, if possible.
3x² + 4x - 10

Find trinomial (quadratic expression), given below, find whether it is factorisable or not. Factorise, if possible.
x(2x - 1) - 1 

Factorise : 4√3x² + 5x - 2√3

Factorise : 7√2x² - 10x - 4√2

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

Solve, using cross-multiplication :
4x - y = 5
5y - 4x = 7

Solve, using cross-multiplication :
4x - 3y = 0
2x + 3y = 18

Solve, using cross-multiplication :
8x + 5y = 9
3x + 2y = 4

Solve, using cross-multiplication :
4x - 3y - 11 = 0
6x + 7y - 5 = 0

Solve, using cross-multiplication :
4x + 6y = 15
3x - 4y = 7

Solve, using cross-multiplication :
0.4x - 1.5y = 6.5
0.3x + 0.2y = 0.9

Solve, using cross-multiplication :
√2x - √3y = 0
√5x + √2y = 0