Question

Evaluate using identity 8.9²​

Answer 1

Answer:

17.8 ans hai okkk what is your name

Answer 2

Answer:

8.9 = (9 - 0.1)

8.9² = (9 - 0.1)²

Identity 2 --> (a - b)² = a² - 2ab + b²

Here, a = 9 & b = 0.1

(9 - 0.1)² = 9² - (2 × 9 × 0.1) + 0.1²

= 81 - (1.8) + 0.01

= 79.2 + 0.01

= 79.21