Question

what is the age of whole square​

Answer 1

Answer:

In this section, you will learn the formula or expansion  for (a - b)2.

That is,  

(a - b)2  =  (a - b)(a - b)

(a - b)2  =  a2 - ab - ab + b2

(a - b)2  =  a2 - 2ab + b2

Solved Problems

Problem 1 :  

Expand :  

(p - q)2  

Solution :

(p - q)2 is in the form of (a - b)2

Comparing (a - b)2 and (p - q)2, we get

a  =  p

b  =  q

Write the formula / expansion for (a - b)2.

(a - b)2  =  a2 - 2ab + b2

Substitute p for a and q for b.  

(p - q)2  =  p2 - 2(p)(q) + q2

(p - q)2  =  p2 - 2pq - q2

So, the expansion of (p - q)2 is

p2 - 2pq + q2

Explanation: