Question

The value of (under root 5 + under root 2)(under root 5 - under root 2) is:

A)10

B)7

C)3

D) under root 3​

Answer 1

Answer:

3

Explanation:

(a+b)(a-b)= a square + b square

Answer 2

Heya user ! ️✋

✍Here's the required answer :

Given :

(√5+√2)(√5-√2)

• As we know : (a+b)(a-b)= a²-b²

Therefore, using this identity here , we get :

• (√5+√2)(√5-√2) = (√5)²-(√2)²
• This is equal to : 5-2= 3
• Hence, correct option is C) 3.

*[ The words in bold and italics are keywords ]

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Thanks for the question ☺

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