Simplify (221a222122)^2 , This Question Is From Class 9 "Chapter 1 - Number System"(Ncert)

Simplify (√2−2)^2 , this question is from class 9 "chapter 1 - Number System"(NCERT)

 

Answer:

6-4√2

Step-by-step explanation:

To find the product of or simplify a square of binomial (√2 - 2)² where:

First term of binomial ⇒ √2

Second/Last term of binomial  ⇒  -2

Follow these steps:

1) Square the first term

⇒  (√2)(√2) = √4 =  2

2) Twice the product of first and last term  

⇒  2(√2)(-2) = -4√2

3) Square the last term  

⇒  (-2)(-2) = + 4

4) Combine the like terms  

⇒ 2+ 4 - 4√2

⇒ 6-4√2


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