what are the roots to 3x^2-27x-0 ?!

Question

anonymous · Answer

you could use the quadratic formula to find the roots :

i got the formula on a attachment

accessdenied · Answer

Also, you could set it equal to 0 and solve for x by factoring (usually factoring is easier than the formula, when possible):
  3x^2 - 27x - 0 = 0    - 0 just disappears...
  3x^2 - 27x = 0     Greatest Common Factor: 3x
  3x(x - 9) = 0      If ab = 0, then a = 0 or b = 0
  3x = 0   or   x - 9 = 0

You can solve for x in each case for the roots.

anonymous · Answer

9

anonymous · Answer

Access Denied provided the formulas:
3x = 0 and x-9 = 0

Solving for x:

3x/3 = 0/3 ,  x = 0

x - 9 + 9 = 0 + 9,  x = 9

The solution indicates that the parabola crosses the x axis at 0 and also at +9.