Question

using expansion evaluate: 205​

Answer 1

Answer:

using expansion evaluate = 42025

Answer 2

Answer:

I hope it is helpful

Step-by-step explanation:

Here, we will use the identity (a+b)^2 = a^2 + 2ab + b^2 . so we can write 205 as (200 + 5) then we square it so we get (200+5)^2, then we use the identity = 200*200 + 2*200*5 + 5*5 = 40000+2000+25 = 42025