quadratic equations...

Asked by kanishkaaggarwal | 2nd Dec, 2009, 07:16: AM

Expert Answer:

let x be the units place and y be the tens place digit

xy =24......(i)

and 10y+x-18 = 10x+y

so y-x=2 or y =x+2

From (i)  x2+2x=24

So x2+6x-4x-24=0  so x= -6 or x=4

neglecting negative term

x=4 so y =6

so the number is 64

 

Answered by  | 2nd Dec, 2009, 10:29: AM

Pre Board Assessment
Ask Doubt

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.