Factorise the Following by the Difference of Two Squares: 441 - 81y2 - Mathematics

Factorise the following by the difference of two squares:
441 - 81y²

Sum

441 - 81y²= (21)² - (9y)²= (21 - 9y)(21 + 9y)
= 3(7 - 3y)3(7 + 3y)
= 9(7 - 3y)(7 + 3y).

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Method of Factorisation : Difference of Two Squares

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Chapter 5: Factorisation - Exercise 5.3

Chapter 5 Factorisation
Exercise 5.3 | Q 1.03

Factorise : 9a² + 3a - 8b - 64b²

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

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

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

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

Factorise the following by the difference of two squares:
16a⁴ - 81b⁴

Factorise the following by the difference of two squares:
(x + y)² -1

Factorise the following by the difference of two squares:
x² + y² - z² - 2xy

Factorise the following:

`x^2 + (1)/x^2 - 2`

Factorise the following:

(x² + y² – z²)² – 4x²y²