Question

What is the square of 195 using easy method

Answer 1

Answer: 42025

Step-by-step explanation:

195^2 = (200-5)^2

Remember : (a-b)^2 = a^2 +b^2 -2ab

here a=200 , b=5 in the formula

So, (200-5)^2 = 200^2 +5^2 +2(200)(5)

=40000+25+2000=42025