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If the total of two numbers is 25 and itsmultiplication is 144, then their difference is(A) 6(C) 7(B) 5(D) 4 |
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Answer» Ans :- LetOne number = xother number = y Sum====x+y=25x=25-y...............(1)Product=======xy=144...............(2)Put the value of x in above equation(25-y)y=14425y-y^2=144y^2-25y+144=0y^2-16y-9y+144=0y^2-16y-9y+144=0y(y-16)-9(y-16)=0(y-9)(y-16)=0y-9=0 or y-16=0y=9 or y=16Put the value of y in (1)x=25-16=9x=25-9=16So numbers are 9 and 16 |
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