Rohini had scored 10 more marks in her mathematics test out of 30 marks, 9 times these marks
would have been the square of her actual marks. How many marks did she get in the test?
(A) 14 (B) 16 (C) 15 (D) 18
Answers
Answered by
5
Answer:
15 square is the answer of your questions
Answered by
7
Answer:
15
Step-by-step explanation:
9(10+x)=x^2
90+9x=x^2
x^2-9x-90=0
x^2-15x+6x-90=0
x(x-15)+6(x-15)=0
(x+6) (x-15)
so, x= -6 and +15
as x is not equal to +/-6
therefore x=15
Similar questions