Question

Haldwani scored 10 more marks in her mathematics test out of 30 marks 9 times these marks should have been the square of the actual marks how many marks did got in the test??​

Answer 1

Answer:

let the marks scored by ajita be x according to the given condition

9(x + 10) = x2

x2 - 9x - 90 = 0 =

x2 – 15x +6x - 90 = 0

x(x – 15) + 6(x – 15) = 0

x= 15 or x = -6

marks obtained cannot be neagative

so,x = 15

marks obtained by ajita are 15