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?? About the author Charlotte
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 Reply
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