Question

The product of neelam's age 5 years ago and 8 years is 40.find neelam's present age

Answer 1

Answer:

The answer might be 13 year's

(x-5) (x-8) =40

x^2-8x-5x+40=40

x^2-13x=0

Now substitute 13 in x's place then

13^2-13×13=0

169-169=0

so that x= 13