SOLUTION: x^3-3x^2-9x+27

Algebra ->  Equations -> SOLUTION: x^3-3x^2-9x+27      Log On


   

Question 685133: x^3-3x^2-9x+27
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
+x%5E3-3x%5E2-9x%2B27.....group

+%28x%5E3-9x%29-%283x%5E2-27%29...factor out
+x%28x%5E2-9%29-3%28x%5E2-9%29
+%28x-3%29%28x%5E2-9%29
+%28x-3%29%28x%5E2-3%5E2%29
+%28x-3%29%28x-3%29%28x%2B3%29
solutions:
if +x-3=0..=>...+x=3....one double solution
if +x%2B3=0..=>...+x=-3

+graph%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+40%2C++x%5E3-3x%5E2-9x%2B27%29+