SOLUTION: a) Solve 3x^2 = 21 "what are the solutions??" b) find the x intercepts of f(x) = 3x^2 - 21 "the x intercepts are?"

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equation Customizable Word Problems -> SOLUTION: a) Solve 3x^2 = 21 "what are the solutions??" b) find the x intercepts of f(x) = 3x^2 - 21 "the x intercepts are?"      Log On


   

Question 357261: a) Solve 3x^2 = 21 "what are the solutions??"

b) find the x intercepts of f(x) = 3x^2 - 21 "the x intercepts are?"
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
a)
3x^2=21
x^2=7
x=sqrt(7), x=-sqrt(7)
.
b)
x intercepts are sqrt(7) and -sqrt(7)
.
Ed
.
graph%28500%2C500%2C-10%2C10%2C-10%2C10%2C3x%5E2-21%29