Question

Use the identity and find the square of 189.
(a-b)2 =A2 - 2ab + b2

Answer 1

Step-by-step explanation:

( 190-1) = (190)2 - 2( 190*1) + ( 1 )2

=36,100- 380 + 1

=35,721

35,721 is the square of 189=