Question

using suitable identities find the value of 11×9​

Answer 1

(10+1)*(10-1)

10 Square - 1 Square

100-1

99

Hope it helps you........

Answer 2

Answer:

99

Step-by-step explanation:

(10+1) (10-1)

10^2-1^2

100-1

99

Hence 11×9=99