Question

find the product using sutaible identity
(7x - 9y)(7x-9)​

Answer 1

$Answer$

$a²-b²= (a-b)(a+b)$

Answer 2

★ ANSWER :

(7x - 9y) (7x - 9y) = 49x² - 81y²

Step-by-step explanation:

★ QUESTION :

Fnd the product using sutaible identity.

(7x - 9y) (7x - 9)

★ CONCEPT USED :

(a + b) (a - b) = a² - b²

★ SOLUTION :

Using the Algeric Identity (a + b) (a - b) = a² - b²

Here ,

a = 7x

b = 9

(7x - 9y) (7x - 9)

= (7x)² - (9y)²

= 49x² - 81y²

★ ANSWER :

(7x - 9y) (7x - 9y) = 49x² - 81y²

★ ADDITIONAL INFORMATION :

(a + b)² = a² + b² + 2ab

(a - b)² = a² + b² - 2ab

(a + b) (a - b) = a² - b²

HOPE IT HELPS YOU !

THANKS !