in a class test, the sum of shefali's mark in mathematics and english is 30. had she got 2 marks more in mathematics and 3 marks less in English, the product of their marks would have been 210 . find her marks in two subjects.
Answers
Answered by
2
Step-by-step explanation:
go according to the instruction given in the question
hope this helped you out
please mark this as brainliest
Attachments:
Answered by
4
Let us say, the marks of Shefali in Maths be x.
Then, the marks in English will be 30 – x.
As per the given question,
(x + 2)(30 – x – 3) = 210
(x + 2)(27 – x) = 210
⇒ -x2 + 25x + 54 = 210
⇒ x2 – 25x + 156 = 0
⇒ x2 – 12x – 13x + 156 = 0
⇒ x(x – 12) -13(x – 12) = 0
⇒ (x – 12)(x – 13) = 0
⇒ x = 12, 13
Therefore, if the marks in Maths are 12, then marks in English will be 30 – 12 = 18 and the marks in Maths are 13, then marks in English will be 30 – 13 = 17.
Similar questions