Question
Download Solution PDFযদি x 2 − 2xy = 84 এবং x −y = −10 হয়, তাহলে y এর মান হল:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFপ্রদত্ত:
x 2 − 2xy = 84
x = y - 10
গণনা:
প্রশ্ন অনুযায়ী,
x 2 − 2xy = 84 ------------(1)
এবং x = y - 10
এখন, সমীকরণ (1) এ x = y - 10 বসিয়ে পাই
(y - 10)² - 2y(y - 10) = 84
⇒y² - 20y + 100 - 2y² + 20y = 84
⇒- y² = 84 - 100
⇒ y² = 16
⇒ y = 4
সুতরাং, প্রয়োজনীয় মান হল 4
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