Question

Evaluate 105 108 without multiplying directly.​

Answer 1

Answer:

105 × 108

= (100+5) (100+8)

USE THE IDENTITY

(x + a)(x + b) = $x^{2}$ + (a + b)x + ab

where x = 100 , a = 5 and b = 8  

= 100(100) +100(8) + 5(100) + 5(8)

= 10000 + 800 + 500 + 40

= 10000 + 1300 + 40

= 11340

Answer 2

above answer is right☝️☝️