Had Ram 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?
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Answer:
15
Step-by-step explanation:
according to given ,girls marks be "x"
ram scored 10 more than girls marks
so rams score is "x+10"
according to given
(x +10)9 = x^2
9x+90= x^2
=x^2 -9x-90
= x^2-15x+6x-90
=x(x-15)+6(x-15)
=(x-15) (x+6)
therefore
x=15. [ x=-6]
hence her marks is 15
as marks cant be negative
and ramus marks is x+10
as x is 15
15+10=25
ramu scores 25
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