যদি p + q = 5 এবং p - q = 3 হয়, তবে p2 + q2 =?
Solution
Correct Answer: Option B
দেওয়া আছে, p + q = 5
p - q = 3
আমরা জানি,
2(p2 + q2) = (p + q)2 + (p - q)2
বা, 2(p2 + q2) = 52 + 32
বা, 2(p2 + q2) = 25 + 9
বা, 2(p2 + q2) = 34
বা, (p2 + q2) = 34/2
(p2 + q2) = 17
p - q = 3
আমরা জানি,
2(p2 + q2) = (p + q)2 + (p - q)2
বা, 2(p2 + q2) = 52 + 32
বা, 2(p2 + q2) = 25 + 9
বা, 2(p2 + q2) = 34
বা, (p2 + q2) = 34/2
(p2 + q2) = 17
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