Question

If a=2 and b=1, then verify that (a- b)2 = a2 +b2- 2ab.



please give me perfect answer and fast because my exam ​

Answer 1

Answer:

Step-by-step explanation:

given; a=2   b=1

(a-b)^2 = a^2+b^2-2ab

(2-1)^2=  2^2 +1^2 -2*2*1

        =   4+1-4

        = 1

Answer 2

Answer:

Given,

a=2 , b=1

LHS RHS

(a-b)^2 = a^2 + b^2 - 2ab

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

2*2 - 2*1 = 4 + 2 - 4

4 - 2 = 6 - 4

+2 = +2

Therefore,(a-b)^2= a^2 + b^2 - 2ab