SOLUTION: find all real numbers solutions for the equation 5x^3(third power)=20x

Algebra ->  Equations -> SOLUTION: find all real numbers solutions for the equation 5x^3(third power)=20x      Log On


   

Question 646110: find all real numbers solutions for the equation
5x^3(third power)=20x
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!
5x%5E3=20x
5x%5E3-20x=0
5x%28x%5E2-4%29=0
5x%28x%5E2-2%5E2%29=0
5x%28x-2%29%28x%2B2%29=0
solutions:
if 5x=0.....=>...x=0
if x-2=0....=>...x=2
if x%2B2=0....=>...x=-2

+graph%28+600%2C+600%2C+-10%2C+10%2C+-20%2C+20%2C+5x%5E3-20x%29+