Question 60126
Solution:


The Profit equation is given by: 


P = {{{x^2 + 5x - 50 }}}


Hence, to know the values of "x", we shall solve the equation by the method of 


factorization.


{{{x^2 + 5x - 50 = 0}}}



{{{x^2 + 10x - 5x - 50 = 0 }}}


{{{x(x + 10) - 5(x + 10) = 0}}}


(x + 10) ( x - 5) = 0


x = -10 or x = 5 


Since "x" cannot take negative values, the value of x = 5 


Hence, Jim sells 5 mobiles to make the profit.