Question

the difference of the present age of 2 sister is 5years after 4 years the product of their age become 104. find the present age​

Answer 1

Step-by-step explanation:

Let the sister and her sister's age be X yrs and X+5 yrs respectively.

As per the question,

X(X+5)=104

X2+5X−104=0

X2+13X−8X+132=0

X(X+13)−8(X+13)=0

(X+13)(X—8)=0

∴X=8orX=−13

∴ The ages of sisters are 8 years and 8+5=13 years respectively, as the age can't be negative