Question

using the identity find the value of 11×9​

Answer 1

Answer:

99

Step-by-step explanation:

We will the algebraic identity (a + b) (a - b) = a² - b²

11 × 9

= (10 + 1) × (10 - 9)

= 10² - 1²

= 100 - 1

= 99

Thanks !

Have a great night ahead !