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

Find the squares of the following:

`(7x)/(9y) - (9y)/(7x)`

Find the squares of the following: 
(2a + 3b - 4c)

Simplify by using formula :
(5x - 9) (5x + 9)

Simplify by using formula :
(2x + 3y) (2x - 3y)

Simplify by using formula :
(a + b - c) (a - b + c)

Simplify by using formula :
(x + y - 3) (x + y + 3)

Simplify by using formula :
(1 + a) (1 - a) (1 + a²)

Simplify by using formula :

`("a" + 2/"a" - 1) ("a" - 2/"a" - 1)`

Evaluate the following without multiplying:
(95)²

Evaluate the following without multiplying:

(103)²

Evaluate the following without multiplying:
(999)²

Evaluate the following without multiplying:
(1005)²

Evaluate, using (a + b)(a - b)= a² - b².
399 x 401

Evaluate, using (a + b)(a - b)= a² - b².
999 x 1001

Evaluate, using (a + b)(a - b)= a² - b².
4.9 x 5.1

Evaluate, using (a + b)(a - b)= a² - b².
15.9 x 16.1

If a - b = 10 and ab = 11; find a + b.

If x + y = 9, xy = 20
find: x - y

If x + y = 9, xy = 20
find: x² - y².

If `"a"  + 1/"a" = 6;`find `"a"  - 1/"a"`