Question
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3.
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Answer (Detailed Solution Below)
Option 4 : $29$ / $29$
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Detailed Solution
सही उत्तर $29$ / $29$ है।
Key Points
Helpful?
prepsnap.in • Part -AQuestion:
If $a + b = 7$ and $ab = 10$, find the value of $a^2 + b^2$. / यदि $a + b = 7$ और $ab = 10$ है, तो $a^2 + b^2$ का मान ज्ञात कीजिए।
1.
$69$ / $69$
2.
$39$ / $39$
3.
$59$ / $59$
4.
$29$ / $29$
Correct Answer: $29$ / $29$
$a^2 + b^2 = (a + b)^2 - 2ab = 7^2 - 2 \times 10 = 49 - 20 = 29$. / $a^2 + b^2 = (a + b)^2 - 2ab = 7^2 - 2 \times 10 = 49 - 20 = 29$।
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