यदि (x+y+z=8) और (xy+yz+zx=19) हो तो \(x^2+y^2+z^2\) क्या है?

If (x+y+z=8) and (xy+yz+zx=19), what is \(x^2+y^2+z^2\)?

Explanation opens after your attempt
Correct Answer

A. (26)सही मान

Step 1

Concept

Using ( (x+y+z)2=x-2+y-2+z-2+2(xy+yz+zx) ), (64=S+38), so (S=26).

Step 2

Why this answer is correct

The correct answer is A. (26) / सही मान. Using ( (x+y+z)2=x-2+y-2+z-2+2(xy+yz+zx) ), (64=S+38), so (S=26).

Step 3

Exam Tip

( (x+y+z)2=x-2+y-2+z-2+2(xy+yz+zx) ) से (64= S+38), इसलिए (S=26)।

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FAQs

Mathematics Answer, Explanation and Revision Hints

यदि (x+y+z=8) और (xy+yz+zx=19) हो तो \(x^2+y^2+z^2\) क्या है? / If (x+y+z=8) and (xy+yz+zx=19), what is \(x^2+y^2+z^2\)?

Correct Answer: A. (26) / सही मान. Explanation: ( (x+y+z)2=x-2+y-2+z-2+2(xy+yz+zx) ) से (64= S+38), इसलिए (S=26)। / Using ( (x+y+z)2=x-2+y-2+z-2+2(xy+yz+zx) ), (64=S+38), so (S=26).

Which concept should I revise for this Mathematics MCQ?

Using ( (x+y+z)2=x-2+y-2+z-2+2(xy+yz+zx) ), (64=S+38), so (S=26).

What exam hint can help solve this Mathematics question?

( (x+y+z)2=x-2+y-2+z-2+2(xy+yz+zx) ) से (64= S+38), इसलिए (S=26)।

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