Question

using the formula (a-b) square=(a2-2ab+b2) find 196square
​

Answer 1

Answer:

(196)^2=(200-4)^2

=(40000)+(16)-2(200) (4)

=40016-1600

=38416

Answer 2

196²

Using Identity :

(a-b)² = a² - 2ab + b²

Solution :

(200 - 4)²

• a = 200
• b = 4

⇛(200 - 4)² = (200)² - 2 (200)×(4) + (4)²

⇛(196)² = 40000 - 1600 + 16

⇛38416 = 40016 - 1600

⇛38416 = 40016 - 1600

⇛38416 = 38416