Seema is 5 years older than her brother mac. The product of their ages is 204 years. What is the age of mac?
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Age of mac =x years
Age of sanya =x+5 yrs
X(x+5)=204
X square +5x =204
X sq +5x -204 =0
By splitting middle term
X sq +17 x -12x -204
X (x +17 ) -12 (x +17)
(x +17) (x-12)
So x =-17 or 12
But age can not be negative
So age of mac =12 years
Sqnya age = 12+5=17 years
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