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please explain question no.20 how to verify answer? class 9

please explain question  no.20 how to verify answer? class 9
 

Question Image
Grade:9

2 Answers

Anish Singhal
askIITians Faculty 1194 Points
2 years ago
Just put the value in the equation if it satisfy the eqn that means value is correct
Arun
25768 Points
2 years ago
Dear Arni
 
Use hit and trial
 
x = 4
 
(sqrt(2))⁴ + (sqrt(3))⁴ = (sqrt(13))^(4/2)
 
2² + 3² = (sqrt(13))²
 
4 + 9 = 13
 
13 = 13
 
LHS = RHS
 
Hence verified

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