Question

solve question no 6 b by using algebraic identity

plz solve this step by step​

Answer 1

Step-by-step explanation:

check out the image for explanation

Answer 2

Step-by-step explanation:

a) 101×101 = let us assume that it is

101×100 which gives 10100

but we also know that it is not 100 but actually 101

so we have to add 101 one more time

10100+101 = 10201 is the answer

b) similarly

2.1×1.9

let us consider it is 2.1×2.0

it gives 4.2 but we also know that

it is not 2.0 it is 1.9

so we have to subtract 2.1 one time

i.e 4.2-.21 = 3.99