Math, asked by sunnypawar067, 4 months ago

*हरप्रितला इतिहासात पहिल्या चाचणीत मिळालेल्या गुणांपेक्षा दुसऱ्या चाचणीत 10 गुण जास्त मिळाले. दुसऱ्या चाचणीतील गुणांची 5 पट ही पहिल्या चाचणीतील गुणांच्या वर्गाइतकी आहे; तर त्याचे दुसऱ्या चाचणीतील गुण किती?*

Answers

Answered by amitnrw
2

Given :

Harpreet got 10 marks more in the second test than he got in the first test in history. 5 times the marks in the second test is equal to the square of the marks in the first test;

To Find : What are his marks in the second test

Solution:

Harpreet got in the first test in History =  H  marks

Harpreet got in the second test in History =  H + 10  marks

5 times the marks in the second test is equal to the square of the marks in the first test;

=> H² = 5(H + 10)

=> H² - 5H - 50 = 0

=> H² -10H - 5H - 50 = 0

=> H(H - 10) + 5(H - 10) = 0

=> ( H + 5)(H - 10) = 0

=> H = 10   ( H = -5 not possible )

H + 10  = 10 + 10 = 20

marks in the second test  = 20

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