Question

121*119 find the value of using identities​

Answer 1

Where we should use identity

121×119=13553

Answer 2

121 × 119

We can also write this as :

⇒ (120 + 1)(120 - 1)

Identity : (a + b)(a - b) = a² - b²

Here, a = 120, b = 1

⇒ (120)² - (1)²

⇒ 14400 - 1

⇒ 14399

Hence, the answer is 14339.