Question 88605

  y = x^2 + 9x + 18
what is the minimum value
  
  Factorising  18 = 6^3








































    
y = x^2 + 9x + 18
what is the minimum value

   Factorising  18 we get  18 = 6*3 = 18   6+3 = 9 

      y = x^2+6x+3x+18
      y = x(x+6)+3(x+6)  

      y = (x+6)(x+3)

    The solution for the eq'n is x = -6  and x = -3