SOLUTION:

Question 88605:
Answer by malakumar_kos@yahoo.com(315) (Show Source): You can put this solution on YOUR website!

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