Question

Using the formula for squaring a binomial, evaluate the following:
(ii) (78)
(iii) (197)​

Answer 1

Answer:

6084   ,  39409

Step-by-step explanation:

78² =  (80 - 2)²

       = (80)² - 2 x 80 x 2 + (2)²

       =6400 - 320 + 4

       =6084

(197)²  = ( 200 - 3 )²

          =  (200)²  - 2 x 200 x3  + (3)²

          =40000  -  600  +9

          = 39409