quadratic equaations

Asked by newlearner1 | 27th Jul, 2009, 06:20: AM

Expert Answer:

let the no. of children be x.

 so each child has to give x-1 gifts.

 so total no. of gifts=x(x-1)

hence

 x(x-1)=132

(x*x)-x-132=0

solving the quadratic we get,

(x-12)(x+11)=0

so x=12

Answered by  | 27th Jul, 2009, 01:39: PM

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