Saved Bookmarks
| 1. |
Product of pragati age2 yrs ago and 3 years hence is 84. Find her presents age |
|
Answer» PRESENT age be x ACC to equation (x-2)(x+3)=84 x²+x-6=84 x²+x-90=0 x²+10x-9x-90 (x+10)(x-9)=0 either x=-10 or x=9 Age cannot be negative THEREFORE present age is 9 years |
|