Question

Factorise (0.8)² - (0.2)²​

Answer 1

Step-by-step explanation:

(0.8+0.2)(0.8-0.2) = 1×0.6 = 0.6 answer

Answer 2

Since, a^2 - b^2 = (a+b) X (a-b)

So, ( .8 + .2) X ( .8 - .2)

= (1.0) X (.6)

= .6 Answer