Question

Evaluate 105^2 with formula fast​

Answer 1

Step-by-step explanation:

(100+5)^2

it's in form of (a+b)^2

so,a^2+b^2+2ab

a=100

b=5

(100)^2 + (5)^2 + 2×100×5

10000+25+1000

11,025 is answer

Answer 2

Answer:

(105)²

(100+5)²

using identity:-

(a+b)² = a²+b²+2ab

a=100

b=5

= (100)² + (5)² + 2 x 100 x 5

= 10000 + 25 + 1000

= 11025...