Question

At an annual function of a school, each student gives gift to every other student. If the number of gifts is 1980, find the number of students(You will get 2 values for this problem- Quadratic Equation).

Pls show the steps and the correct answer. Answer anyone as fast as possible.​

Answer 1

let no of student be x. by the problem,x(x-1)=1980=>x square-x-1980=0=>xsq.-45x+44x-1980=0=>(x-45)(x-44)=0=>x=45&x=-44(cancelled)