Problema Solution
the formula N=2x^2+5x+3 represents the number of households n, in thousands, in a certain that have a computer x years after 1990. According to the formula, in what year were there 55 thousand households with computers in this city?
Answer provided by our tutors
N=2x^2+5x+3
55= 2X^2+5X+3
OR 2X^2 + 5X -52=0
or 2x^2 + 13x-8x -52 =0
or x(2x+13) - 4(2x+13)=0
or x = 4 or -13/2
Take +ve whole number n = 4
So, in 1994.