Question

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
​

Answer 1

Answer:

15 square is the answer of your questions

Answer 2

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