the poduct of thanas age five years agohis age ten years later is 16 determine his present age
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let tanay's present age be x yrs
five yrs ago tanay's age = x-5
ten yrs later tanay's age =x+10
according to the question.,
=(x-5)(x+10)=16
=x^2 +10x-5x-50=16
=x^2+5x-66=0
=x^2+11x-6x-66=0
=x (x+11)-6 (x+11)=0
=(x-6)(x+11)=0
=x=6 or x=-11
since age is positive tanay's present age =6yrs
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