Question
Download Solution PDFযদি x + y = 7 এবং xy = 19 হয়, তাহলে x2 + y2 এর মান নির্ণয় করুন।
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFপ্রদত্ত:
x + y = 7
xy = 19
অনুসৃত সূত্র:
(x + y)2 = x2 + y2 + 2xy
গণনা:
x + y = 7
উভয় পক্ষের বর্গ করে পাই,
⇒ (x + y)2 = 72
⇒ x2 + y2 + 2xy = 49
⇒ x2 + y2 = 49 - 2 × 19
⇒ x2 + y2 = 11
∴ x2 + y2 এর মান হল 11
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